Although there have been many studies about the decorations of Anatolian Seljuk and Principality periods, there are still ongoing disputes about ornamentation terminology. In this study, the aim is to identify sphere, sphere and cone cross-sections/bosses and rosettes. The use of sphere, sphere crosssections/bosses and rosettes is a common practice during the Seljuk and Principality periods. Mostly, bosses and rosettes have been lined gradually and symmetrically in the portal, the mihrab's recess and the squinch. Sphere cross sections/bosses and rosettes reflect a variety of construction and ornamentation techniques. In terms of construction techniques, two main groups attract attention: the ones that are directly carved onto the surface of the stone and the ones that have been added or implemented to the surface of the stone. Carving is the most common decoration technique, and geometrical designs, especially stars, are the most common ornamentation types. The technique of perforations is preferred because they are more suitable for the forms of sphere, sphere and cone cross-sections.Sphere, sphere and cone cross sections/bosses and rosettes in the Anatolian Seljuk and Principality periods are most commonly seen in buildings in the cities of Karaman, Kayseri, Konya, Niğde, and Sivas in the Central Anatolian Region. In other words, these features are common in regions where stone materials are densely used, and we encounter them on the portals of large scale constructions such as hans, madrasah, hospital and mosques.