Ancient Celtic Pentagram Knot, Concho, 36 x 36 mm, 925 Antique Silver plated, 1 rivet pin
Celtic knots are a variety of (mostly endless) knots and stylized graphical representations of knots used for decoration, adopted by the ancient Celts. These knots are most known for their adaptation for use in the ornamentation of Christian monuments and manuscripts like the 8th century St. Teilo Gospels, the Book of Kells and the Lindisfarne Gospels. Examples of plaitwork (a woven, unbroken cord design) predate knot work designs in several cultures around the world, but the broken and reconnected plaitwork that is characteristic of true knot work began in Northern Italy and Southern Gaul and spread to Ireland by the 7th century. The style is most commonly associated with the Celtic lands but it was also practiced extensively in England and was exported to Europe by Irish and Northumbrian monastic activities on the continent. In modern times Celtic Art is popularly thought of in terms of national identity and therefore specifically Irish, Scottish or Welsh. J. Romilly Allen has identified "eight elementary knots which form the basis of nearly all the interlaced patterns in Celtic decorative art; however, there is no evidence to indicate that a knot had any specific philosophical or religious significance beyond perhaps the most obvious, that being the intricacy capable in the work of humans, itself reflective of the intricacy of Natural forms. Many items decorated with knotwork have been found in archaeological sites.