This imposing fort with its clock is located at the north side of Trikala and is the ancient citadel of the city. It has been built during the Hellenistic period, but has been completely remodeled in the 6^th century as a medieval fort, while during the Turkish domination it underwent some transformations. Today there is an open air theater in the fort. Visitors can enjoy the city view from the clock tower and, of course, sunset is the best time of the day.