Born Anton Franz Englert, Father Sebastian spent his school days in Eichstätt and Burghausen. In 1907, he entered the novitiate of the Order of Friars Minor Capuchin and received the religious name Sebastian. He undertook his canonical studies in philosophy and theology in the Capuchin studium of Dillingen, and was ordained to the priesthood in 1912.
Born Anton Franz Englert, Father Sebastian spent his school days in Eichstätt and Burghausen. In 1907, he entered the novitiate of the Order of Friars Minor Capuchin and received the religious name Sebastian. He undertook his canonical studies in philosophy and theology in the Capuchin studium of Dillingen, and was ordained to the priesthood in 1912. During the First World War, Father Sebastian served as a chaplain in the German Army in France and Belgium, and after the war he worked for five years as a parish priest in the Schwabing district of Munich. In 1922, he went at his own request as a missionary to the Mapuche in Southern Chile.