 He filled the position of master of novices at Weingarten and professor of humanities at Feldkirch (1635), from which on the approach of the Swedish army he was forced to flee to Vienna, Venice, and finally Admont (1646).There he was appointed prior of St. John's monastery, Feldkirch (1651), where he remained until a few months before his death, when he returned to Weingarten.Bucelin was a universal scholar and a very prolific writer, being the author of some fifty-three works on genealogy, world history, hagiography and church history.