A variant spelling or Italian form of a round cap or beret, especially one worn by clergy or in formal dress.
Italian form of berret, from French beret. The -tta suffix is an Italian diminutive or variant ending. Became especially associated with Catholic clergy who wear a berretta as part of religious attire.
Catholic bishops still wear berrettas as part of their formal clerical dress, making it one of the oldest continuously-worn hats in Europe—some designs haven't changed in hundreds of years!
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