overview opening hours admission The Gallery of the Prague — Troja Municipal District is located near the Troja Castle. Regular exhibitions of contemporary Czech artists are held here. opening hours january—december mon—thu closed fri 13:00—17:00 sat—sun 10:00—18:00 more about opening hours admission free more about admission admission free opening hours january—december mon—thu closed fri 13:00—17:00 sat—sun 10:00—18:00