The reenactment of the Empecinado's wedding Activity · Castrillo de Duero, Campo de Peñafiel, Valladolid Image of Castrillo de Duero, not of the place itself. On the first Saturday of August the village stages the wedding of Juan Martín el Empecinado, its most famous resident, with period costume and a procession through the streets, within the summer festivities. Photo: Ydelpico (CC BY-SA 3.0) What to see and do in Castrillo de Duero