birrete
The birrete is the square academic cap that forms part of the standard academic dress in many universities, especially in Spanish-speaking countries. It is worn with a gown during graduation and other formal ceremonies. The cap consists of a stiff, flat square board (the mortarboard) attached to a soft, fitted skullcap. A tassel is fixed to the center of the board and hangs down.
Materials vary, commonly felt, wool, or synthetic fabrics. The cap is usually black, but colors and trim
Traditionally, the birrete originated from medieval academic dress and is linked to the biretta worn by clergy
Usage and symbolism: During graduation ceremonies, the tassel is often moved from the right side to the