- A.U.
- A.U.
► Abbreviation in general use, chiefly EcclesiasticalAlma Urbs ("Beloved City" — i.e., Rome)The Catholic Encyclopedia, Volume VIII. — New York: Robert Appleton Company. Nihil Obstat. 1910.
Catholic encyclopedia.
The Catholic Encyclopedia, Volume VIII. — New York: Robert Appleton Company. Nihil Obstat. 1910.
Catholic encyclopedia.