Juan Téllez Girón, el gran mecenas de Osuna Curiosity · Osuna, Sierra Sur, Seville Image of Osuna, not of the place itself. Born around 1494, Juan Téllez Girón drove, over some thirty years, the construction of thirteen churches and convents, a hospital, the university and the ducal crypt of Osuna. Photo: Graeme Churchard from Bristol (51.4414, -2.5242), UK (CC BY 2.0) What to see and do in Osuna