The pileus quadratus, a type of Roman skullcap topped with a horizontal square board, has given rise to a number of similar cap styles, among them the biretta worn by the Roman Catholic clergy and the academic mortarboard cap. The academic headgear is embellished with a tassel or liripipe, which may be dyed black, colored to represent the graduate’s area of expertise, or matched to a school’s colors. According to urban legend, why did some UK universities cease to use the cap? Discuss
Source: The Free Dictionary