What is shield bosses?

Shield bosses are circular metal or wooden devices used to protect and strengthen the center of a shield. They are typically centered on the shield and provide a point of impact for the weapon of the attacker. Shield bosses come in different sizes and shapes and can be plain or decorated with ornate designs. They are usually made of iron, brass or bronze and are attached to the shield by riveting or bolting. The use of shield bosses dates back to ancient times, and they were commonly used in medieval Europe, Viking and Norman shields. They were often used in combination with other protective devices such as a knight's armor to provide enhanced defense in battle.