Loc.gov

Loc.gov

August, 21 2020 12:07:59 AM

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Search Engine Optimization

Title Tag

Home | Library of Congress
Length: 39 character(s)

Ideally, your title tag should contain between 10 and 70 characters (spaces included).
Make sure your title is explicit and contains your most important keywords.
Be sure that each page has a unique title.

Meta Description

The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office.
Length: 157 character(s)

Meta descriptions contains between 100 and 300 characters (spaces included).
It allow you to influence how your web pages are described and displayed in search results.
Ensure that all of your web pages have a unique meta description that is explicit and contains your most important keywords (these appear in bold when they match part or all of the user's search query).
A good meta description acts as an organic advertisement, so use enticing messaging with a clear call to action to maximize click-through rate.

Meta Keywords

No Keywords

Meta Keywords are a specific type of meta tag that appear in the HTML code of a Web page and help tell search engines what the topic of the page is.
However, google can't use meta keywords.

Headings

<H1>	<H2>	<H3>	<H4>	<H5>	<H6>
1	49	6	0	0	0

<H1> The Library of Congress Homepage </H1>
<H2> Featured Items </H2>
<H2> Trending </H2>
<H2> Your Library </H2>
<H2> Free to Use and Reuse: Clocks & Calendars </H2>
<H2> Street clock in Seattle, Washington, which was known as the "City of Clocks." Photo by Carol Highsmith, around 2000. </H2>
<H2> "Philadelphia clubs at home." Poster with baseball game dates, 1915 </H2>
<H2> Aztec calendar stone, now called sun stone. Photo by William Henry Jackson, around 1890. </H2>
<H2> Draco volvelle used to connect dates with the the moon's position. In: Peter Apian's "Astronomicum Caesarium." Ingolstadt, 1540. Rare Book and Special Collections Division </H2>
<H2> "Your mellow chimes awaken men to start the day 'on time' Big Ben." Alarm clock advertisement, 1921. </H2>
<H2> Poster calendar 1897. By Edward Penfield. </H2>
<H2> "3 minutes intermission while changing pictures." Photo used in a movie theater, 1912. </H2>
<H2> "D. Webster Clegg's new century calendar for ascertaining the day of the week of your birth, or any other eventful occasion ..." Poster, 1876. </H2>
<H2> Presidential campaign calendar. 1888 </H2>
<H2> Rich's mini golf, clock, Wyoming, Pennsylvania. Photo by John Margolies, 1980. </H2>
<H2> Metropolitan horse racing calendar, mostly in New York. Poster, 1905. </H2>
<H2> Clocks and other memorabilia in the office of W.P. Kloster, at the Dublin Bottling Works in Dublin, Texas. Photo by Carol Highsmith, 2014. </H2>
<H2> Astrological device showing signs of the Chinese calendar, with case. Drawing, 1878. </H2>
<H2> Sun clock at Meridian Hill Park, Washington, DC. Photo by Theodor Horydczak, around 1940. </H2>
<H2> Kalender Maister Johannes Künigsperger. Book published in Augsburg by Erhard Ratdolt, 1496. Rare Book & Special Collections Division </H2>
<H2> Man with clocks. Photo by Harris & Ewing, 1923. </H2>
<H2> "The Alarm Clock" by Avery Hopwood. Poster for the Federal Theatre Project, 1936-1938. </H2>
<H2> Census Population Clock, Department of Commerce, Washington, DC. Photo by Warren Leffler, 1971. </H2>
<H2> Swiss clock (Mantle). Print, 1877. </H2>
<H2> Beauty holding a calendar scroll for the year of the rat. Japanese print, 1804. </H2>
<H2> Home-made candies, delicious and economical recipes for March. In the "Candy Calendar" by the Woman's World Magazine, 1923. General Collections </H2>
<H2> "The signs of the Zodiac, National Museum, Rome, Italy." Stereograph by Keystone, early 1900s. </H2>
<H2> Zodiac signs Scorpio and Capricorn. Design drawing for Library of Congress, Great Hall floor, 1895. </H2>
<H2> Greenfield Village Henry Ford Museum, Dearborn, Michigan. Detail. Sir John Bennett store. Photo by Balthazar Korab Studios, 2003. </H2>
<H2> Astronomical clock, old town hall, Prague, Czech Republic. Photochrom by Photoglob Zurich, around 1900. </H2>
<H2> Calendar page for October 1905 with images of Chicago. In "Chicago Calendar," by Almira Lovell. General Collections </H2>
<H2> "The Woman Suffrage Calendar, 1910." New York. Rare Book & Special Collections </H2>
<H2> Mercantile calendar for 1860. Advertisement by John H. Duyckinck for his printing business, 1859. </H2>
<H2> Clock cleaner in historic Union Station in Washington, DC. Photo by Carol Highsmith, around 2000. </H2>
<H2> The mechanical system of a clock driven by weights and pendulum. In: "Theatrum machinarium," 1725. Rare Book & Special Collections </H2>
<H2> "8 o'clock breakfast coffee. The great Atlantic & Pacific Tea Co.," New York. Print, 1877. </H2>
<H2> "Saving daylight ends, for 1918, Sunday, Oct. 27th. Set your clock back one hour at 2 A.M." Advertisement sponsored by United Cigar Stores Company. </H2>
<H2> Liberty loan clock displayed at Federal Hall, New York City. Photo by Bain News Service, 1918. </H2>
<H2> Two O'Clock Club sign, Baltimore, Maryland. Photo by John Margolies, 1995. </H2>
<H2> Thomas Alva Edison punching time clock on his 74th birthday anniversary, February 11, 1921. </H2>
<H2> An elegant original clock inside the former St. Louis Union Station, Missouri. Photo by carol Highsmith, 2021. </H2>
<H2> On a mild December Sunday afternoon, a small crowd gathers to watch Stuff and Guff strike the hour, New York City. Photo by Angelo Rizzuto, 1953. </H2>
<H2> Clock tower, Dubuque, Iowa. Photo by Carol Highsmith, around 2000. </H2>
<H2> Miss Ella Nachman with a normal sized alarm clock and the world's largest alarm clock by Mauthe. Photo by Underwood & Underwood, 1925-1930. </H2>
<H2> Tiled stove in the Prince's chamber. Rostov Velikii, Russia. Photo by Sergeii Prokudin-Gorskii, 1911 </H2>
<H2> Floral clock in Princes Street Gardens, Edinburgh, Scotland. Stereograph by Keystone View Col, around 1910. </H2>
<H2> November in "Twelve Months of the Year." Woodblock print portfolio by Winold Reiss, 1923. </H2>
<H2> Captive balloon with clock face and bell, floating above the Eiffel Tower, Paris, France. Drawing by Camille Grávis, around 1890. </H2>
<H2> Grandfather clock presented to the DAR at Memorial Continental Hall, Washington, DC. Photo by Harris & Ewing, 1924. </H2>
<H2> Molinelli Jewelers street clock, neon, Main Street, Pocatello, Idaho </H2>
<H3> Online Reference Service Available </H3>
<H3> Library of Congress Winter-Spring 2026 Concert Season </H3>
<H3> Library of Congress Acquires “Wizard of Oz” Musical Sketches To Add to the Harold Arlen Collection </H3>
<H3> Thursday Night Fun & Programs </H3>
<H3> Congress.gov </H3>
<H3> Top Searches: </H3>

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Use your keywords in the headings and make sure the first level (H1) includes your most important keywords. Never duplicate your title tag content in your header tag.
While it is important to ensure every page has an H1 tag, never include more than one per page. Instead, use multiple H2 - H6 tags.

Google Preview

Home | Library of Congress

loc.gov/

The world's largest library. View historic photos, maps, books and more. Contact experts for help with research. Plan a visit. Home of U.S. Copyright Office.

This is an example of what your Title Tag and Meta Description will look like in Google search results.
While Title Tags & Meta Descriptions are used to build the search result listings, the search engines may create their own if they are missing, not well written, or not relevant to the content on the page.
Title Tags and Meta Descriptions are cut short if they are too long, so it's important to stay within the suggested character limits.

Alt Attribute

We found 37 images on this web page

10 ALT attributes are empty or missing.

/static/images/logo-loc-new-branding.svg
/static/home/images/trending/blogs/2025-pnp-ice-cream_480x320.jpg
/static/home/images/trending/lcm/2025mayjun_480x320.jpg
/static/home/images/trending/evergreen/news2022_480x320.jpg
/static/home/images/trending/evergreen/events2022_480x320.jpg
/static/home/images/trending/exhibits/exhibitions-evergreen-suffrage-48079406641_69c1146579_k.jpg
/static/home/images/trending/blogs/celebrating-barbecue_480x320.jpg
/static/home/images/your-library/01-PlanYourVisit.jpg
/static/home/images/your-library/02-ResearchCenter.jpg
/static/home/images/your-library/03-AskLibrarian.jpg

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Alternative text is used to describe images to give the search engine crawlers (and the visually impaired).
Also, more information to help them understand images, which can help them to appear in Google Images search results.

Keywords Cloud

statue42
liberty30
photo13
library11
congress11
view8
torch8
world7
york6
poster6
music5
stands5
pedestal5
more4
hand4

This Keyword Cloud provides an insight into the frequency of keyword usage within the page.
It's important to carry out keyword research to get an understanding of the keywords that your audience is using. There are a number of keyword research tools available online to help you choose which keywords to target.

Keyword Consistency

Keywords	Freq	Title	Desc	<H>
statue	42
liberty	30
photo	13
library	11
congress	11
view	8
torch	8
world	7
york	6
poster	6
music	5
stands	5
pedestal	5
more	4
hand	4

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This table highlights the importance of being consistent with your use of keywords.
To improve the chance of ranking well in search results for a specific keyword, make sure you include it in some or all of the following: page URL, page content, title tag, meta description, header tags, image alt attributes, internal link anchor text and backlink anchor text.

Text/HTML Ratio

HTML to Text Ratio is: 3.12%

Text content size	5419 bytes
Total HTML size	173784 bytes

Code to text ratio represents the percentage of actual text on a web page compared to the percentage of HTML code, and it is used by search engines to calculate the relevancy of a web page.
A higher code to text ratio will increase your chances of getting a better rank in search engine results.

GZIP compression

Oh No! GZIP is not enabled.

Your webpage size is 170 KB, could be compressed upto 32 KB using GZIP (81 % size savings)

Gzip is a method of compressing files (making them smaller) for faster network transfers.
It allows to reduce the size of web pages and any other typical web files to about 30% or less of its original size before it transfer.

WWW Resolve

Great, a redirect is in place to redirect traffic from your non-preferred domain.

Redirecting requests from a non-preferred domain is important because search engines consider URLs with and without "www" as two different websites.

IP Canonicalization

No your domain IP 104.17.6.58 does not redirect to loc.gov

To check this for your website, enter your IP address in the browser and see if your site loads with the IP address.
Ideally, the IP should redirect to your website's URL or to a page from your website hosting provider.
If it does not redirect, you should do an htaccess 301 redirect to make sure the IP does not get indexed.

XML Sitemap

Good, you have XML Sitemap file!
http://loc.gov/sitemap.xml

A sitemap lists URLs that are available for crawling and can include additional information like your site's latest updates, frequency of changes and importance of the URLs. This allows search engines to crawl the site more intelligently.
We recommend that you generate an XML sitemap for your website and submit it to both Google Search Console and Bing Webmaster Tools. It is also good practice to specify your sitemap's location in your robots.txt file.

Robots.txt

Good, you have Robots.txt file!
http://loc.gov/robots.txt

A robots.txt file allows you to restrict the access of search engine robots that crawl the web and it can prevent these robots from accessing specific directories and pages. It also specifies where the XML sitemap file is located.
You can check for errors in your robots.txt file using Google Search Console (formerly Webmaster Tools) by selecting 'Robots.txt Tester' under 'Crawl'. This also allows you to test individual pages to make sure that Googlebot has the appropriate access.

URL Rewrite

Good, all URLs look clean and friendly

Your site's URLs contain unnecessary elements that make them look complicated.
A URL must be easy to read and remember for users. Search engines need URLs to be clean and include your page's most important keywords.
Clean URLs are also useful when shared on social media as they explain the page's content.

Underscores in the URLs

Great, you are not using underscores (these_are_underscores) in your URLs

Great, you are not using ?underscores (these_are_underscores) in your URLs.
While Google treats hyphens as word separators, it does not for underscores.

Embedded Objects

Perfect, no embedded objects has been detected on this page

Embedded Objects such as Flash. It should only be used for specific enhancements.
Although Flash content often looks nicer, it cannot be properly indexed by search engines.
Avoid full Flash websites to maximize SEO.

Iframe

Perfect, no Iframe content has been detected on this page

Frames can cause problems on your web page because search engines will not crawl or index the content within them.
Avoid frames whenever possible and use a NoFrames tag if you must use them.

Domain Registration

Exactly how many years and months

Domain Age: Not Available

Created Date: Not Available

Updated Date: Not Available

Expiry Date: Not Available

Domain age matters to a certain extent and newer domains generally struggle to get indexed and rank high in search results for their first few months (depending on other associated ranking factors). Consider buying a second-hand domain name.
Do you know that you can register your domain for up to 10 years? By doing so, you will show the world that you are serious about your business.

WHOIS Data

WhoIs domain information can help you determine the proper administrator, billing and technical
contact information.

Domain Name: loc.gov
Registrar WHOIS Server: whois.nic.gov
Registrar URL: https://get.gov
Updated Date: 2025-07-07T17:49:37Z
Creation Date: 1997-10-02T01:29:25Z
Registry Expiry Date: 2026-07-07T17:49:37Z
Registrar: get.gov
Registrar IANA ID: 8888888
Registrar Abuse Contact Email:
Registrar Abuse Contact Phone:
Domain Status: renewPeriod https://icann.org/epp#renewPeriod
Domain Status: serverTransferProhibited https://icann.org/epp#serverTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: REDACTED FOR PRIVACY
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: REDACTED FOR PRIVACY
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: REDACTED FOR PRIVACY
Registrant Phone: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Email: REDACTED FOR PRIVACY
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Email: REDACTED FOR PRIVACY
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Email: REDACTED FOR PRIVACY
Registry Security ID: REDACTED FOR PRIVACY
Security Name: REDACTED FOR PRIVACY
Security Organization: REDACTED FOR PRIVACY
Security Street: REDACTED FOR PRIVACY
Security City: REDACTED FOR PRIVACY
Security State/Province: REDACTED FOR PRIVACY
Security Postal Code: REDACTED FOR PRIVACY
Security Country: REDACTED FOR PRIVACY
Security Phone: REDACTED FOR PRIVACY
Security Email: security@loc.gov
Name Server: alice.ns.cloudflare.com
Name Server: kevin.ns.cloudflare.com
DNSSEC: signedDelegation
>>> Last update of WHOIS database: 2025-07-11T11:14:54Z <<<

For more information on Whois status codes, please visit https://icann.org/epp

WHOIS information is provided by the registry solely for query-based,
informational purposes. Any information provided is "as is" without any
guarantee of accuracy. You may not use such information to (a) allow,
enable, or otherwise support the transmission of mass unsolicited,
commercial advertising or solicitations; (b) enable high volume, automated,
electronic processes that access the registry's systems or any
ICANN-Accredited Registrar, except as reasonably necessary to register
domain names or modify existing registrations; or (c) engage in or support
unlawful behavior. We reserve the right to restrict or deny your access to
the WHOIS database, and may modify these terms at any time.

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WhoIs domain information can help you determine the proper contact for any domain listed in the Whois database.
A WhoIs lookup identifies the administrator contact information, billing contact and the technical contact for each domain name listing or IP in the WhoIs database.

Indexed Pages

Indexed pages in search engines

0 Page(s)

This is the number of pages that we have discovered on your website.
A low number can indicate that bots are unable to discover your webpages, which is a common cause of a bad site architecture & internal linking, or you're unknowingly preventing bots and search engines from crawling & indexing your pages.

Backlinks Counter

Number of backlinks to your website

0 Backlink(s)

Backlinks are links that point to your website from other websites. They are like letters of recommendation for your site.
Since this factor is crucial to SEO, you should have a strategy to improve the quantity and quality of backlinks.

Usability

URL

http://loc.gov
Length: 3 characters

Keep your URLs short and avoid long domain names when possible.
A descriptive URL is better recognized by search engines.
A user should be able to look at the address bar and make an accurate guess about the content of the page before reaching it (e.g., http://www.mysite.com/en/products).

Favicon

Great, your website has a favicon.

Favicons improve a brand's visibility.
As a favicon is especially important for users bookmarking your website, make sure it is consistent with your brand.

Custom 404 Page

Bad, your website has no custom 404 error page.

When a visitor encounters a 404 File Not Found error on your site, you're on the verge of losing the visitor that you've worked so hard to obtain through the search engines and third party links.
Creating your custom 404 error page allows you to minimize the number of visitors lost that way.

Page Size

170 KB (World Wide Web average is 320 Kb)

Two of the main reasons for an increase in page size are images and JavaScript files.
Page size affects the speed of your website; try to keep your page size below 2 Mb.
Tip: Use images with a small size and optimize their download with gzip.

Load Time

0.26 second(s)

Site speed is an important factor for ranking high in Google search results and enriching the user experience.
Resources: Check out Google's developer tutorials for tips on how to to make your website run faster.

PageSpeed Insights (Desktop)

0 / 100

Page Speed

Loc.gov desktop website speed is slow. Page speed is important for both search engines and visitors end.

Enter your suggestion box message

Language

Good, you have declared your language
Declared Language: English

Make sure your declared language is the same as the language detected by Google
Also, define the language of the content in each page's HTML code.

Domain Availability

Domains (TLD)	Status
loc.com	Already Registered
loc.net	Already Registered
loc.org	Already Registered
loc.biz	Already Registered
loc.us	Already Registered

Typo Availability

Domains (TLD)	Status
poc.gov	Already Registered
ooc.gov	Already Registered
ioc.gov	Already Registered
koc.gov	Already Registered
moc.gov	Already Registered

Email Privacy

Email address has been found in plain text!

We don't recommend adding plain text/linked email addresses to your webpages.
As malicious bots scrape the web in search of email addresses to spam. Instead, consider using a contact form.

Safe Browsing

The website is not blacklisted and looks safe to use.

Safe Browsing to identify unsafe websites and notify users and webmasters so they can protect themselves from harm.

Mobile

Mobile Friendliness

Oh No! This page is not mobile-friendly.
Your mobile friendly score is 0/100

Mobile Friendliness refers to the usability aspects of your mobile website, which Google uses as a ranking signal in mobile search results.

Mobile View

The number of people using the Mobile Web is huge; over 75 percent of consumers have access to smartphones. ??
Your website should look nice on the most popular mobile devices.
Tip: Use an analytics tool to track mobile usage of your website.

Mobile Compatibility

Perfect, no embedded objects detected.

Embedded Objects such as Flash, Silverlight or Java. It should only be used for specific enhancements.
But avoid using Embedded Objects, so your content can be accessed on all devices.

PageSpeed Insights (Mobile)

0 / 100

Page Speed

Loc.gov mobile website speed is slow. Page speed is important for both search engines and visitors end.

Enter your suggestion box message

Technologies

Server IP

Server IP	Server Location	Service Provider
104.17.6.58	United States	Cloudflare

Your server's IP address has little impact on your SEO. Nevertheless, try to host your website on a server which is geographically close to your visitors.
Search engines take the geolocation of a server into account as well as the server speed.

Speed Tips

Tips for authoring fast-loading HTML pages:

Perfect, your website has few CSS files.

True

Perfect, your website has few JavaScript files.

True

Perfect, your website doesn't use nested tables.

False

Too bad, your website is using inline styles.

Website speed has a huge impact on performance, affecting user experience, conversion rates and even rankings.
???By reducing page load-times, users are less likely to get distracted and the search engines are more likely to reward you by ranking your pages higher in the SERPs.
Conversion rates are far higher for websites that load faster than their slower competitors.

Analytics

We didn't detect an analytics tool installed on this website.

Web analytics let you measure visitor activity on your website.
You should have at least one analytics tool installed, but It can also be good to install a second in order to cross-check the data.

W3C Validity

W3C not validated

W3Cis a consortium that sets web standards.
Using valid markup that contains no errors is important because syntax errors can make your page difficult for search engines to index. Run the W3C validation service whenever changes are made to your website's code.

Doc Type

Your Web Page doctype is HTML 5

The Doctype is used to instruct web browsers about the document type being used.
For example, what version of HTML the page is written in.
Declaring a doctype helps web browsers to render content correctly.

Encoding

Great, language/character encoding is specified: UTF-8

Specifying language/character encoding can prevent problems with the rendering of special characters.

Link Analysis

In-Page Links

We found a total of 81 links including both internal & external links of your site

Anchor	Type	Follow
Library of Congress	Internal Links	Dofollow
Discover	Internal Links	Dofollow
Services	Internal Links	Dofollow
Visit	Internal Links	Dofollow
Education	Internal Links	Dofollow
Connect	Internal Links	Dofollow
Donate	Internal Links	Dofollow
About	Internal Links	Dofollow
Help	Internal Links	Dofollow
Contact	Internal Links	Dofollow
Thursday Night Fun & Programs Live! at the Library features evening engagement in a gorgeous setting.	Internal Links	Dofollow
Digital Collections	Internal Links	Dofollow
Researchers	Internal Links	Dofollow
Teachers	Internal Links	Dofollow
World War II	Internal Links	Dofollow
Newspapers	Internal Links	Dofollow
Veterans	Internal Links	Dofollow
Civil War	Internal Links	Dofollow
Slavery	Internal Links	Dofollow
Civil Rights	Internal Links	Dofollow
Events Our Calendar of Upcoming Events, In-Person & Virtual	Internal Links	Dofollow
Exhibitions Explore Library Exhibitions in Person & Online	Internal Links	Dofollow
Research Centers	Internal Links	Dofollow
content that is free to use and reuse	Internal Links	Dofollow
http://loc.gov/resource/ppmsca.02957/	Internal Links	Dofollow
http://loc.gov/resource/ppmsca.18288/	Internal Links	Dofollow
http://loc.gov/resource/hhh.ny1251.sheet/?sp=26	Internal Links	Dofollow
http://loc.gov/resource/ppmsca.69415/	Internal Links	Dofollow
http://loc.gov/resource/highsm.13921/	Internal Links	Dofollow
http://loc.gov/resource/ppmsca.18334/	Internal Links	Dofollow
http://loc.gov/resource/cph.3g08032/	Internal Links	Dofollow
http://loc.gov/resource/hhh.ny1251.photos/?sp=48	Internal Links	Dofollow
http://loc.gov/resource/cph.3a20714/	Internal Links	Dofollow
http://loc.gov/resource/mrg.06184/	Internal Links	Dofollow
http://loc.gov/resource/ds.14924/	Internal Links	Dofollow
http://loc.gov/resource/ds.14918/	Internal Links	Dofollow
http://loc.gov/resource/ds.14922/	Internal Links	Dofollow
http://loc.gov/resource/cph.3b49098/	Internal Links	Dofollow
http://loc.gov/resource/cph.3g06264/	Internal Links	Dofollow
http://loc.gov/resource/cph.3f03869/	Internal Links	Dofollow
http://loc.gov/resource/ppmsca.34805/	Internal Links	Dofollow
http://loc.gov/resource/ds.12388/	Internal Links	Dofollow
http://loc.gov/resource/hhh.ny1251.photos/?sp=27	Internal Links	Dofollow
http://loc.gov/resource/hhh.ny1251.photos/?sp=59	Internal Links	Dofollow
http://loc.gov/resource/hhh.ny1251.sheet/?sp=39	Internal Links	Dofollow
http://loc.gov/resource/highsm.16024/	Internal Links	Dofollow
http://loc.gov/resource/highsm.45303/	Internal Links	Dofollow
http://loc.gov/resource/highsm.45304/	Internal Links	Dofollow
http://loc.gov/resource/hhh.ny1251.sheet/?sp=6	Internal Links	Dofollow
https://loc.gov/subscribe/	Internal Links	Dofollow
Accessibility	Internal Links	Dofollow
Legal	Internal Links	Dofollow
Inspector General	Internal Links	Dofollow
External Link Disclaimer	Internal Links	Dofollow
Careers	Internal Links	Dofollow
Donate	Internal Links	Dofollow
Shop external link	External Links	Dofollow
Ask a Librarian	External Links	Dofollow
Search Online Catalog	External Links	Dofollow
Copyright.gov	External Links	Dofollow
Congress.gov	External Links	Dofollow
Authors Announced for Sep. 6 National Book Festival More than 90 authors come to Washington to celebrate 25 years of uniting book lovers	External Links	Dofollow
Summer Movies on the Lawn Fun films in an open-air setting Thursday nights in July and August.	External Links	Dofollow
Library Acquires Stephen Sondheim Collection Collection includes music and lyrics for "Send in the Clowns," "Company," "Sweeney Todd," "Into the Woods" and more	External Links	Dofollow
Blogs	External Links	Dofollow
Blog One Scoop or Two? Ice Cream Cones for Summer Relief	External Links	Dofollow
Magazine Collecting the Contemporary Work of Native Artists	External Links	Dofollow
News Get the Latest News from the Library of Congress	External Links	Dofollow
Blog Get it Hot Off the Pit: Celebrating Barbecue	External Links	Dofollow
https://www.facebook.com/libraryofcongress/	External Links	Dofollow
https://x.com/librarycongress	External Links	Dofollow
https://www.youtube.com/libraryofcongress/	External Links	Dofollow
https://www.pinterest.com/LibraryCongress/	External Links	Dofollow
https://www.flickr.com/photos/library_of_congress/	External Links	Dofollow
https://instagram.com/librarycongress/	External Links	Dofollow
https://itunes.apple.com/us/artist/library-of-congress/id1280713133?mt=2	External Links	Dofollow
Take our survey External	External Links	Dofollow
https://copyright.gov	External Links	Dofollow

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While there's no exact limit to the number of links you should include on a page, best practice is to avoid exceeding 200 links.
Links pass value from one page to another, but the amount of value that can be passed is split between all of the links on a page. This means that adding unnecessary links will dilute the potential value attributed to your other links.
Using the Nofollow attribute prevents value from being passed to the linking page, but it's worth noting that these links are still taken into account when calculating the value that is passed through each link, so Nofollow links can also dilute pagerank.

Broken Links

Broken links were found on this web page

https://www.youtube.com/libraryofcongress/

https://itunes.apple.com/us/artist/library-of-congress/id1280713133?mt=2

Broken links send users to non-existing web pages. They are bad for your site's usability, reputation and SEO. If you find broken links in the future, take the time to replace or remove each one.

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