The Tehran Museum of Contemporary Art houses, in its vaults and periodically in its galleries, one of the most remarkable collections of Western 20th-century art in the world. The collection was assembled in the 1970s by Empress Farah, who engaged major curators and dealers to acquire canonical works of Western modern and contemporary art for Iran. The result includes works by Picasso, Warhol, Bacon, Pollock, Lichtenstein, and dozens of other major figures.
The building itself — a spiral concrete structure with skylights designed by Kamran Diba in 1977 — is a significant work of architecture in its own right. What you actually see when you visit depends entirely on the current exhibition; the permanent collection is shown in rotation and sometimes not at all. The Iranian contemporary art collection is always on display and includes some genuinely powerful work. The museum is also an important venue for Iranian artists and there is usually a serious temporary exhibition.