It has become a rite of passage — popes visiting Latin America, in particular Mexico or Cuba, don a sombrero at some point during the trip, usually on the plane on the flight out. But there has also been occasions when a pope is presented with a sombrero, by visiting Latin Americans, at the Vatican.
The first pope to wear one appears to have been Paul VI. He only made one trip to Latin America, and that was to Colombia, in August 1968 to attend the 39th International Eucharistic Congress in Bogotá.
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