The museum of art has a substantial permanent collection of internationally recognized works. They are exhibited in the Munson-Williams-Proctor Arts Institute Museum of Art Building. It is an International-style building designed by architect Philip Johnson and completed in 1960. A model of the building was exhibited in the United States Pavilion at the Brussels' World's Fair of 1958. It is a 60,000 sqft square and supported by eight external ferro-concrete piers, or two on each side. The exterior structural members are clad in bronze and "black" Canadian granite. The windowless cube is set above windowed office areas recessed in a dry moat, giving a "floating" effect. The interior features a two-story central courtyard, illuminated by a skylight, known as the Edward Wales Root Sculpture Court. It also holds an auditorium seating 271. It was listed on the National Register of Historic Places in 2010.