On its south side, Constitution Avenue NW is bordered by several monuments and museums. These include Lincoln Memorial, Vietnam Veterans Memorial, Constitution Gardens, and the grounds of the Washington Monument. The relocated U.S. Capitol Gatehouses and Gateposts are at Constitution Avenue NW and 15th Street NW. East of the grounds of the Washington Monument are several museums: the National Museum of African American History and Culture (under construction as of 2013), the National Museum of American History, the National Museum of Natural History, National Gallery of Art Sculpture Garden, and the National Gallery of Art. Once past the National Gallery of Art, the ground of the United States Capitol border the south side of the avenue.