An ecclesiastical term meaning a pilgrimage to the sepulchres of St. Peter and St. Paul at Rome, i.e., to the Basilica of the Prince of the Apostles and to the Basilica of St. Paul "outside the walls".
APA citation. Ad Limina Apostolorum. (1907). In The Catholic Encyclopedia. New York: Robert Appleton Company. http://www.newadvent.org/cathen/01128a.htm
MLA citation. "Ad Limina Apostolorum." The Catholic Encyclopedia. Vol. 1. New York: Robert Appleton Company, 1907. <http://www.newadvent.org/cathen/01128a.htm>.
Ecclesiastical approbation. Nihil Obstat. March 1, 1907. Remy Lafort, S.T.D., Censor. Imprimatur. +John Cardinal Farley, Archbishop of New York.
Contact information. The editor of New Advent is Kevin Knight. My email address is webmaster at newadvent.org. Regrettably, I can't reply to every letter, but I greatly appreciate your feedback — especially notifications about typographical errors and inappropriate ads.