What is the name of the cap worn by Roman Catholic clergymen? - Quora
A red hat is just a red hat (unless it isn't) – Catholic World Report
What is a Catholic bishop's hat called? - Quora
Colors Worn By Cardinals and Bishops | Simply Catholic
What's the hat called? - Chicagoland - Chicago Catholic
Colors of a Bishop, Cardinal and Monsignor --Aleteia
Lwanga Communications Centre - The Main Items of bishops' insignia 1. The skull cap, or zucchetto. This small round cap, worn towards the back of the head, dates to the 13th century
Zucchetto - Wikipedia
Attire of a Cardinal - Catholic Standard - Multimedia Catholic News
Off with his hat! Why we want to see cardinals punished in the abuse scandal