The Colegiata de Santa Maria de la Asuncion is the most interesting old building in Osuna. This large 16th Century former collegiate church is in the Renaissance style with some Gothic features. Inside are many fine pieces of art, including Ribera`s Cristo de la Expiracion, and other works by this painter are in the sacristy. There is also an ornate Baroque retable. The tour also takes in the underground 16th Century Sepulcro Ducal, the chapel and burial place of the Dukes of Osuna.
