OCTOBER... - Archdiocese of Manila - Office of Communications | Facebook
15 Callixtus I Photos and Premium High Res Pictures - Getty Images
File:Coat of Arms of Pope Callixtus III.svg - Wikimedia Commons
Pope Callixtus I or Callistus I, Pope from c. 218 to his death c. 222 Stock Photo - Alamy
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29 Pope Callixtus Photos and Premium High Res Pictures - Getty Images
St. Callistus I
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Saint of the day: Pope Callistus I
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File:Pope Callixtus III Siena.jpg - Wikimedia Commons
Pope Callixtus († 222): heretic or saint? - LA CIVILTÀ CATTOLICA
Web Gallery of Art, searchable fine arts image database
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Pope St Callixtus I - PopeHistory.com
