 This practice is evidenced archaeologically, with many male warrior burials (such as the ship burial at Balladoole on the Isle of Man, or that at Oseberg in Norway) also containing female remains with signs of trauma.According to Adémar de Chabannes, just before his death in 932 or 933, Rollo (founder and first ruler of the Viking principality of Normandy) practised human sacrifices to appease the pagan gods, and at the same time made gifts to the churches in Normandy.Adam von Bremen recorded human sacrifices to Odin in 11th-century Sweden, at the Temple at Uppsala, a tradition which is confirmed by "Gesta Danorum" and the Norse sagas.