The National Art Center, Tokyo (NACT) is located a short walk from Roppongi Hills and is an empty museum. This means that the museum does not have a collection, permanent exhibits, and curators. It was built on the former site of a research facility the Institute of Solid State Physics of the University of Tokyo. The NACT was a joint project of the Agency for Cultural Affairs and the National Museums Independent Administrative Institution. The architect Kisho Kurokawa designed the building and is the largest art museum in Japan. It first opened in 2007 and had 69 exhibitions scheduled throughout the year by various organizations. Since then it has thrived with holding only special exhibitions instead of maintaining a collection. The Monet exhibit they held in their first year was the second most visited exhibition in the world.