The East Wing of National Gallery of Art sits adjacent to the museum's original neoclassical home, and both contrasts and compliments the original gallery. Built to house the National Gallery of Art's Modern Art collection, the structure is composed of  triangular shapes—with corners of the stone-clad main building rising high to produce an abstract turret-like effect. A triangular paneled glass roof covers the central atrium that connects the two buildings.  Photo 5 of 12 in 10 I.M. Pei Buildings We Love