The Tiaras of the Popes: Pope Pius XI ~ Liturgical Arts Journal
Triple tiara hi-res stock photography and images - Alamy
File:Pope Pius XI tiara.jpg - Wikimedia Commons
The Saint Bede Studio Blog: Papal Retrospective: The Triple Tiara
The Pope and the Papal Tiara's symbolic power - La Stampa
The Importance of the Papal Tiara and False Equality | by Rt Hon Limbu | Catholicism for the Modern World | Medium
TabloidArtHistory on Twitter: "Mosaic depicting Pope Clement VIII wearing a papal tiara. // Rihanna wears a mitre to the 2018 Met Gala. https://t.co/uLZNy597N0" / Twitter