Solomon R. Guggenheim Museum

Frank Lloyd Wright–designed modern art museum with an architecturally significant spiral rotunda.

Frank Lloyd Wright's 1959 spiral rotunda on Fifth Avenue is one of the 20th century's most significant works of architecture — the Guggenheim's permanent collection runs from Kandinsky and Brancusi to the present, with the building acting as the institution's most persuasive argument for the integration of art and architecture.