The fortress on the Danube at Linz was first documented in the 8th century. It was rebuilt in the 15th century by Emperor Friedrich III, and there are partial remains this phase of the castle’s history still in evidence today. At the beginning of the17th century, the castle was once again redesigned incorporating the main city date, the Rudolfstor. Subsequently the building became a military, a provincial prison and then a barracks. Between 1953 and 1963, the fortress was rebuilt and restored as a museum containing permanent exhibitions of art from the Middle Ages to the present day, historical weapons and musical instruments, coins, folklore and technical history
