One of the only surviving palaces from the royal parklands between Imam Sq and Chahar Bagh Abbasi St, Safavid-era Chehel Sotun is today most famous for its frescoes. It was built as a pleasure pavilion and reception hall, using the Achaemenid-inspired talar (columnar porch) style. There are historical references to the palace dating from 1614; however, an inscription uncovered in 1949 says it was completed in 1647 under the watch of Shah Abbas II. Either way, what you see today was rebuilt after a fire in 1706. Opening hours: 8am-5pm, 8am-noon & 2pm-sunset summer