In 2005, the Yale Center for British Art was awarded the Twenty-five Year Award by the American Institute of Architects. This prestigious honor recognizes architectural landmarks of enduring significance completed within the previous 25 to 35 years that have withstood the test of time. Only one such award is given each year. The Center was the fifth building designed by Louis I. Kahn to receive AIA’s Twenty-five Year Award, joining the Yale University Art Gallery (1979; built 1951), the Salk Institute for Biological Studies (1992; built 1959), Phillips Exeter Academy Library (1997; built 1965), and the Kimbell Art Museum (1998; built 1966).