The altarpiece by Francisco Giralte Monument · Quintanilla de Onésimo, Campo de Peñafiel, Valladolid Image of Quintanilla de Onésimo, not of the place itself. The church of San Millán, of the sixteenth century and with three naves with star vaults, keeps a Renaissance altarpiece by the sculptor Francisco Giralte considered among the most notable in Castilla y León. The church partly collapsed in 1958. Photo: Rastrojo (D•ES) (CC BY-SA 4.0) What to see and do in Quintanilla de Onésimo