quatrefoil

thumb|Quatrefoil above the west door of Croyland Abbey showing in [[relief scenes from the life of Saint Guthlac]] thumb|Quatrefoil window at the St. Petrus parish church in Peterslahr, Germany A quatrefoil (anciently caterfoil) is a decorative element consisting of a symmetrical shape which forms the overall outline of four partially overlapping circles of the same diameter. It is found in art, architecture, heraldry and traditional Christian symbolism. The word 'quatrefoil' means "four leaves", from the Latin , "four", plus , "leaf"; the term refers specifically to a four-leafed clover, but applies in general to four-lobed shapes in various contexts. In recent years, several luxury brands have attempted to fraudulently assert creative rights related to the symbol, which naturally predates any of those brands' creative development. A similar shape with three rings is called a trefoil, while a shape with five is a cinquefoil.

==History== The quatrefoil enjoyed its peak popularity during the Gothic and Renaissance eras. It is most commonly found as tracery, mainly in Gothic architecture, where a quatrefoil often may be seen at the top of a Gothic arch, sometimes filled with stained glass. Although the design is often referred to as of Islamic origin, there are examples of its use that precede the birth of Islam by almost 200 years. The Monastery of Stoudios in Constantinople, built in 462 AD, features arches seen to be the product of taking a regular quatrefoil and dividing it in half.