![The Library of Congress opened its catalogs to the world. Here's why it matters | Wisconsin Valley Library Service The Library of Congress opened its catalogs to the world. Here's why it matters | Wisconsin Valley Library Service](https://wvls.org/wp-content/uploads/2017/08/LOCstudent-tour.jpg)
The Library of Congress opened its catalogs to the world. Here's why it matters | Wisconsin Valley Library Service
![Main Reading Room | Thomas Jefferson Building | Virtual Views | Visiting the Library | Library of Congress Main Reading Room | Thomas Jefferson Building | Virtual Views | Visiting the Library | Library of Congress](https://www.loc.gov/static/portals/visit/online-tours/images/jefferson/main-reading-room/mainreadingroom_standard.jpg)
Main Reading Room | Thomas Jefferson Building | Virtual Views | Visiting the Library | Library of Congress
![Members of the public tour the main reading room during a open house at the Library of Congress in Washington, D.C. on October 10, 2011. The Library of Congress invited members of Members of the public tour the main reading room during a open house at the Library of Congress in Washington, D.C. on October 10, 2011. The Library of Congress invited members of](https://c8.alamy.com/comp/W0GHAN/members-of-the-public-tour-the-main-reading-room-during-a-open-house-at-the-library-of-congress-in-washington-dc-on-october-10-2011-the-library-of-congress-invited-members-of-the-general-public-to-visit-the-main-reading-room-at-the-jefferson-building-upikevin-dietsch-W0GHAN.jpg)
Members of the public tour the main reading room during a open house at the Library of Congress in Washington, D.C. on October 10, 2011. The Library of Congress invited members of
![Library of Congress al Twitter: "Planning a visit to Washington DC? Put the Library of Congress on your itinerary. Gorgeous architecture, fascinating exhibits & right across the street from the U.S. Capitol Library of Congress al Twitter: "Planning a visit to Washington DC? Put the Library of Congress on your itinerary. Gorgeous architecture, fascinating exhibits & right across the street from the U.S. Capitol](https://pbs.twimg.com/media/D-VbOLrWwAANI0T.jpg)