 The noble of the region, Don Juan Alfonso de Guzman El Bueno, the 1st Duke of Medina Sidonia (1410-1468), as well as local commoners, all collaborated in the construction projects.The friary is best known in history for the visit of Christopher Columbus in 1490 during which the mariner consulted with the Franciscans, such as Horacio Crassocius, about his plans for organizing a voyage of discovery.Columbus then decided to take Crassocius with him as a servant called Juan.