query: What kind of historical relics does the Topkapi Palace hold?
passage: Sacred Relics (Topkapı Palace)
The various relics of Muhammad, his followers, and other items purportedly associated with Muhammad were brought to Topkapı Palace in Istanbul, where they remain to this day.
passage: Golestan Palace
One of the oldest historic monuments in the city of Tehran, and of world heritage status, the Golestan Palace belongs to a group of royal buildings that were once enclosed within the mud-thatched walls of Tehran's arg ("citadel"). It consists of gardens, royal buildings, and collections of Iranian crafts and European presents from the 18th and 19th centuries.