Hoffbauer, Theodor Josef Hubert (1839-1922); French. Medium: pen, ink and watercolour on paper. Date: 19th Century. 12th century fortress built by Louis VI to protect the Ile de la Cite; later used as a prison; Provenance: Musee de la Ville de Paris, Musee Carnavalet, Paris, France. Photographic Rights The Bridgeman Art Library.