Baltimore Museum of Art

Two sisters from Baltimore, Claribel and Etta Cone, spent the early 20th century buying pictures most of their neighbours found baffling. They knew Gertrude Stein in Paris, visited Matisse in his studio, and came home with hundreds of his works. When Etta died in 1949 the Cone Collection went to the Baltimore Museum of Art, which now holds one of the world's great concentrations of Henri Matisse.

The museum itself dates from 1914 and moved in 1929 into a restrained classical building by John Russell Pope, the architect who would later design the Jefferson Memorial in Washington.

There are two sculpture gardens outside and, like its neighbour the Walters, the museum has been free to enter since 2006.