Just inside the Iron Gates inside Diocletian's Palace you will find the entry to a chapel. Founded in the 6th century under Byzantine rule, the chapel was consecrated to St Theodore, patron saint of soldiers. It's bell tower, built around the year 1100 is the oldest Romanesque bell tower in Dalmatia. The chapel was renamed after a 13th century medieval icon which once hung in the chapel and is now kept in the Cathedral Treasury.