Poisoning of Sancho I the Fat Curiosity · Castrelo de Miño, Ribeiro, Ourense Image of Castrelo de Miño, not of the place itself. It was on this land that Sancho I the Fat, king of León, was poisoned to death in the year 967, an episode tied to the old double monastery of Castrelo, which passed in turn through the hands of the bishop of Ourense and of several orders. Photo: José Antonio Gil Martínez (CC BY 2.0) What to see and do in Castrelo de Miño