Explore the largest library in the world and a true architectural crown jewel of Washington, D.C. The Library of Congress features a magnificent display of Gilded Age extravagance, with a Great Hall renowned for its Beaux-Arts murals and sculpted marble. In addition to its striking design, the library houses over 170 million items—including Thomas Jefferson's foundational library, a Gutenberg Bible, and the first map to use the word 'America'—serving as a spectacular monument to the nation's pursuit of knowledge.