The Library of Congress (LOC) is the research library that officially serves the United States Congress and is the de facto national library of the United States. It is the oldest federal cultural institution in the United States. The Library is housed in three buildings on Capitol Hill in Washington, D.C.; it also maintains the National Audio-Visual Conservation Center in Culpeper, Virginia. The Library's functions are overseen by the Librarian of Congress, and its buildings are maintained by the Architect of the Capitol. The Library of Congress has claims to be the largest library in the world. Its "collections are universal, not limited by subject, format, or national boundary, and include research materials from all parts of the world and in more than 450 languages." The Library's primary mission is to research inquiries made by members of Congress, carried out through the Congressional Research Service. The Library is open to the public, although only high-ranking government officials and Library employees may check out books and materials.—Wikipedia
The Smithsonian Institution Building, located near the National Mall in Washington, D.C. behind the National Museum of African Art and the Sackler Gallery, houses the Smithsonian Institution's administrative offices and information center. The building is constructed of Seneca red sandstone in the faux Norman style (a 12th-century combination of late Romanesque and early Gothic motifs; built in the Gothic and Romanesque revival styles) and is nicknamed The Castle. It was completed in 1855 and designated a National Historic Landmark in 1965.—Wikipedia
Colonial Williamsburg is a living-history museum and private foundation presenting part of an historic district in the city of Williamsburg, Virginia. Colonial Williamsburg's 301-acre Historic Area includes buildings from the 18th century (during part of which the city was the capital of Colonial Virginia), as well as 17th-century, 19th-century, and Colonial Revival structures, as well as more recent reconstructions. The Historic Area is an interpretation of a colonial American city, with exhibits of dozens of restored or re-created buildings related to its colonial and American Revolutionary War history. One of the largest history projects in the nation and a tourist attraction, it is part of the Historic Triangle of Virginia, which includes Jamestown and Yorktown, linked by the Colonial Parkway. It was designated a National Historic Landmark District in 1960. Costumed employees work and dress as people did in the era, sometimes using colonial grammar and diction. Prominent buildings include the Raleigh Tavern, the Capitol, the Governor's Palace, as well as the Courthouse, the George Wythe House, the Peyton Randolph House, the Magazine, and independently owned and functioning Bruton Parish Church. Colonial Williamsburg's portion of the Historic Area begins east of the College of William & Mary's College Yard.—Wikipedia