Tudor bonnet

Traditional soft-crowned, round-brimmed cap, with a tassel hanging from a cord encircling the puggaree of the hat

A Tudor bonnet (also referred to as a doctor's bonnet or round cap) is a traditional soft-crowned, round-brimmed cap, with a tassel hanging from a cord encircling the hat. As the name suggests, the Tudor bonnet was popularly worn in England and elsewhere during Tudor times (1485–1603).