The Reza Abbasi Museum is one of Tehran's most rewarding art museums, named for the great Safavid painter but ranging much more widely. Its collections include pre-Islamic objects, metalwork, ceramics, calligraphy, manuscripts, and miniature painting, arranged in a way that gives a compact sweep through Iranian art history.
It is smaller and less overwhelming than the National Museum, which can be an advantage. If you want detail, craft, and close looking rather than monumental archaeology, this is a strong addition to a Tehran museum day.