Official account of the world’s largest library. Explore collections & plan a visit. All Library accounts: https://t.co/KMH2LPXfZvThe Library of Congress is the nation's oldest federal cultural institution, and it serves as the research arm of Congress. It is also the largest library in the world, with more than 162 million items. The collections include books, sound recordings, motion pictures, photographs, maps, and manuscripts.

Core values

- **Serving Congress and the Public**: The Library provides critical research, analysis, and information to Congress, supporting legislative, representational, and oversight duties[1][2][3].
- **Accessibility and Inclusion**: It offers services such as the National Library Service for the Blind and Print Disabled, circulating millions of braille, audio, and large print items[1][2][3].
- **Cultural and Educational Programs**: The Library hosts events like the National Book Festival, Live at the Library programming, and various educational and cultural programs, both in-person and online[1][3].
- **Digital Access and Preservation**: The Library makes its vast collections accessible through digital platforms, including over 178 million website visits and 617 million page views in fiscal 2021, and performs significant preservation actions on its physical collections[1][3].
- **Community Engagement**: The Library engages with diverse audiences through social media, crowdsourcing initiatives like By the People, and other outreach programs[1][3][4].