Buckle

A buckle is a fastener that is typically used to secure a belt or a strap. They freqently have tongues and some also have throat plates running back from the buckle along the belt. Historically buckles could be made of bone, brass, bronze, silver and other metals.

Softer metals do not function well in high load areas as they bend.

A wide variety of buckle shapes existed and there are examples of tongued single (one loop) buckles from at least the Viking Age. Double (two loops on either side of a central bar) buckles existed from at least the medieval era.

They could be highly decorative and smaller buckles appear on shoes from the mid 14th century.