Career
Andreis was born in northern Italy. His early theology teaching career was at the College of the Propaganda in Rome, a school that trained priests for mission work. Louis Dubourg recruited Andres in 1815 to work in the Missouri Territory.
He arrived in Saint Louis in 1817.
Appointed Vicar-General by Dubourg, Andreis also directed a number of educational and spiritual endeavors, including acting as spiritual director of Rose Philippine Duchesne.
