In 1334, King Philippe-Auguste sold the ruins of the Thermes de Cluny (Roman baths) to the Bishop of Cluny (Burgundy), who planned to build a townhouse on the site where his abbots could stay when they came to visit Paris. The current structure, a later rebuild, dates to 1485-1510 and contains a chapel with incredible fan vaults and delicate tracery that are stereotypical of French Flamboyant Gothic architecture.