The Dungeon was built around a 5th century monastery and was a major stronghold throughout many conflicts. It served as a military fortress up until the 15th century, when it was converted into a prison by Louis XI. The gruesome torture chamber was a busy place for those not willing to confess political secrets. On the other hand, Many famous and influential personages were sent to Loches and were fairly well treated. During the Italian wars, the Duke of Milan, Ludovico Sforza was captured and imprisoned there from 1504-1508.