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Library of Congress

First Street and Independence Avenue SE. 202/707-4604. Madison Gallery, Madison Foyer and Current Events Corridor, 8:30 a.m.-9:30 p.m. Monday-Friday, 8:30 a.m.-6:30 p.m. Saturday. Thomas Jefferson Building exhibition area, 10 a.m.-5:30 p.m. Monday-Saturday. Other exhibition areas, 10 a.m.-5:30 p.m. Monday-Saturday. Closed Sunday and holidays. Metro: Capitol South.

• Public tours. 10:30 and 11:30 a.m., 1:30, 2:30 and 3:30 p.m. Monday-Friday; 10:30 and 11:30 a.m., 1:30 and 2:30 p.m. Saturday. Group tours available on request.

• American Treasures Gallery. Thomas Jefferson Building. Through Aug. 18.

Lyceum

201 S. Washington St., Alexandria. 10 a.m.-5 p.m. Monday-Saturday, 1-5 p.m. Sunday. Closed holidays. 703/838-4994.

• “Building a Community: Alexandria Past to Present.” On permanent display.