Museums

KREEGER MUSEUM"Philip Johnson: Architecture as Art," through July 31. Permanent exhibit: The former residence of Carmen and David Kreeger displays 19th- and 20th-century paintings and sculpture, and traditional African art. Open Saturday 10 to 4; guided tours by reservation only Tuesday-Friday at 10:30 and 1:30. $10, seniors and students $7 (through July 31). 2401 Foxhall Rd. NW. 202-338-3552.

LIBRARY OF CONGRESS"Alvin Ailey American Dance Theater: 50 Years as Cultural Ambassador to the World," through Sept. 6. "Bob Hope and American Variety;" "The Library of Congress Experience," interactive displays and kiosks, "Exploring the Early Americas," indefinitely. Library of Congress tours, hourly 10:30 to 3:30 Mondays-Fridays and 10:30 to 2:30 Saturdays. Open Monday-Saturday 10 to 5. 10 First St. SE. 202-707-4604.

LOUDOUN MUSEUM Permanent exhibit: Indian, Revolutionary War, Civil War and local history objects. Open Friday-Saturday 10 to 5, Sunday 1 to 5, Monday and Wednesday-Thursday 10 to 5. $3, students, teachers and seniors $1, age 4 and younger free. 16 Loudoun St. SW, Leesburg. 703-777-7427.

MADAME TUSSAUDS Permanent exhibit: Wax figures of celebrities and historical figures. Open daily 10 to 6. $18, seniors $15, age 4 to 12 $12, younger free. 1025 F St. NW. 888-929-4632.

MARINE CORPS Permanent exhibit: Multimedia displays about the history of the U.S. Marine Corps and its role in the history of the United States, including re-creations of a Korean War battlefield and a Vietnam combat zone. Open daily 9 to 5. 18900 Jefferson Davis Hwy., Triangle. 877-653-1775.

MARYLAND HISTORICAL SOCIETY Open indefinitely: "The Voss Family, Artists of American Sporting Life;" "Borders and Boundaries: The Mason-Dixon Line;" "Maryland's Maritime Heritage: From Fells Point to the World." Open Friday-Sunday and Wednesday-Thursday 10 to 5. $8, seniors and students $6, ages 3 to 12 $4, younger than 3 free. 201 W. Monument St., Baltimore. 410-685-3750.

MARYLAND SCIENCE CENTER"Body Worlds 2" and "The Brain -- Our Three Pound Gem," through Sept. 30 ($24, seniors and students $23, ages 3 to 18; "Body Worlds"-only on selected evenings after museum exhibits close $19, ages 3 to 18 $14). Open Friday-Saturday 9 to 8, Sunday-Thursday 9 to 6, through Aug. 31. Museum admission, depending on options selected, $14-$19.50, ages 4 to 12 $9.50-$13.50. 601 Light St., Baltimore. 410-685-5225.

MOUNT VERNON"Setting the President's Table: American Presidential China From the Robert L. McNeil Jr. Collection," through Jan. 21. The home and burial place of George Washington. Open daily 8 to 5. $13, seniors $12, ages 6 through 11 $6, younger free. 3200 Mount Vernon Memorial Hwy., Alexandria. 703-780-2000.

NATIONAL ARCHIVES"Running for Office: Candidates, Campaigns and the Cartoons of Clifford Berryman," through Aug. 17. Open indefinitely: "Public Vaults;" "The Charters of Freedom;" Permanent exhibit: The Declaration of Independence, the Constitution and the Bill of Rights. Constitution Avenue NW, entrance near Seventh Street Washington, DC 202-357-5000.

NATIONAL BUILDING MUSEUM"Eero Saarinen: Shaping the Future," through Aug. 23. "Cityscapes Revealed: Highlights From the Collection;" "Washington: Symbol and City," indefinitely. Building tours Monday-Wednesday at 12:30; Thursday-Saturday at 11:30, 12:30, 1:30; Sunday at 12:30 and 1:30. Museum open Monday-Saturday 10 to 5, Sunday 11 to 5. 401 F St. NW. 202-272-2448.

NATIONAL CRYPTOLOGIC MUSEUM Permanent exhibit: Artifacts on the history of code-making and code-breaking. Open weekdays 9 to 4. At the National Security Agency, off Route 32, Fort Meade. 301-688-5849.

NATIONAL GALLERY OF ART, EAST BUILDING"Afghanistan: Hidden Treasures From the National Museum, Kabul," through Sept. 7; "Small French Paintings," indefinitely. Permanent exhibit: 20th-century art. Open Friday-Saturday and Monday-Thursday 10 to 5, Sunday 11 to 6. Fourth Street and Constitution Avenue NW. 202-737-4215 (TDD: 202-842-6176).