Catholic Encyclopedia on Apostolic Succession:
https://www.newadvent.org/cathen/01641a.htm
IMAGE CREDIT:
Wolfgang Sauber | CC BY-SA 3.0
Anonymous, ~1180 St Peter Consecrating St Hermagoras as Bishop of Aquileia in Presence of St Mark
Fresco from the Basilica of Santa Maria Assunta
Via Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Aquileia_Basilica_-_Krypta_Fresco_Bischofsweihe_Hermagoras.jpg
