In the 13th century Anatolian architecture, both the appearance and the decoration programs and the portals as important building elements that inform about the ornamentation characteristics of the period. The Anatolian Seljuk civilization continues its existence with its numerous architectural structures and elements of decoration. decorations which are generally independent or in the form of continuation of each other were used in 13th century. the architectural compositions of Anatolian Seljuk period. The part of the door, starting from the starting points of the corner pillars and forming the concave part, surrounding from outside, generally adorned areas are called siege arches. Various compositions that reflect the period features are used in the siege arches, which are a different architectural element with their massive appearances and decorative characteristics. The ornaments on the siege arches show differences in parallel to the number of the arch structure, shape and number of slices. In general, the siege arches which are suitable for the decoration program of the door are very attractive in some examples.
Keywords: Portal, decorations, siege arch, architecture