Viking 10th century silver pin with polyhedral-shaped head, slip-knot ring, and attached chain that is a unique find from Ireland. Another pin was originally attached to the now empty ring on the other end of the chain to form a pair of pins. Paired and chain-linked pins were made in Scandinavia and have been found in Swedish Viking burials. This pin came from an Irish crannog (lake-dwelling) of a regional Irish king. It was imported to Ireland through trade, marriage, or raiding.