During the Middle Ages and Renaissance period, Old Town was encircled by a wall, moat and 13 gates. The moats and walls are gone but Powder Tower is part of the original fortification. The name reflects its former role for storing gun powder. Prašná brána was built in 1475 to protect the southern entrance to Old Town. Its design by Matĕj Rejsek resembles the Old Town Bridge Tower at the north end along the Vltava river. Powder Tower has a history of being the start of the Royal Route. This is the procession path to Prague Castle taken during the coronation of Czech monarchs. This demarcation between Old and New Towns stands 213 feet. You can enjoy the views from its observation deck by climbing 186 steps.