The ducal hat (German: Herzogshut) of the Duchy of Styria is a jagged crown made out of silver-gilt. Believed to be produced in the 15th century, it was refashioned with pearls and enameled in 1766. It was kept in Vienna until 1790, when the Styrian Estates asked it to be returned. In the 19th century, it was refitted again. The ducal hat is about 20.5 cm high, and has a diameter of 20 cm. It is kept today at the Landesmuseum Joanneum (Joanneum National Museum) in Graz, Styria, Austria. The ducal hat is also featured on top of the coat of arms of the federal state of Styria (Steiermark).