Quatrefoil

Three -, four-, five -and six- pass are common ornaments of the Gothic. In the architecture, they are mainly in the tracery, in the design of windows used; also on coins they are as an ornament of Gepräges that enclose the internal design similar to to find since the High Middle Ages as ornamental frame of the Münzrückseite ( reverse ). Tracery with more than four sheets is summarized also called multi pass.

A four- pass, the most common of the molds consists of four outwardly facing circular arcs of equal radii, which are inscribed in a circle. There are two commonly used forms: as there are most quatrefoils either of four semi-circular arches or four three-quarter circle arcs. A quatrefoil has four axes of symmetry.

More rarely occur on the trefoil, the five and the six- pass through. The intersections of the arcs of the Six passport simultaneously provide the basic pattern for the Sechsort.

Quatrefoil shape with three-quarter circle arcs ( less overlap)

Four-pass variant with additional square

Three pass

Three pass at the Porte Narbonnese in Carcassonne

Window from the 13th century with three six -pass forms the top and four three -pass forms below

Landgrave Frederick the Peaceable, Meissen groschen of the mint in Freiberg. In the quatrefoil is a lily cross.