Celtic Knot Leather Tooling Pattern

A leather carving and stamping pattern built from continuous, over-under interlaced cord or ribbon lines with no beginning or end, drawn from the Celtic knot motif of early medieval British and Irish art. True knotted interlace designs appear from around the seventh century, with the earliest known example in a Gospel Book fragment held at Durham Cathedral, and the style was fully developed for use in illuminated manuscript Bibles by around 800 CE; applied to leather tooling, Celtic interlace patterns saw renewed popularity from the 1980s onward, appearing across belts, wallets, bags and other leather goods.