The estate of Chenonceau is first mentioned in writing in the 11th century.[2] The current château was built in 1514–1522 on the foundations of an old mill and was later extended to span the river. The bridge over the river was built (1556-1559) to designs by the French Renaissance architect Philibert de l'Orme, and the gallery on the bridge, built from 1570–1576 to designs by Jean Bullant.[3]