Belt buckle

Byzantine belt buckle from the late 6th or 7th century, with the chape to the right
A Ming dynasty white jade belt buckle with gold
Frame-style buckle: A conventional belt buckle with single square frame and prong
Plate-style "buckle: Back side of original US Civil War buckle, showing bent-arrow chape-end attachment and single-hook mordant
Box-frame "buckle: Box-frame "buckles"
Belt buckle from the Russian navy.

A belt buckle is a buckle, a clasp for fastening two ends, such as of straps or a belt, in which a device attached to one of the ends is fitted or coupled to the other. The word enters Middle English via Old French and the Latin buccula or "cheek-strap," as for a helmet. Belt buckles and other fixtures are used on a variety of belts, including cingula, baltea, baldrics and later waist-belts.