Köşk Madrasah and Dome located in Kayseri is among the important works of Turkish Architecture History. This structure, which belongs to the Eretna Principality, which has a unique plan, was the subject of extensive research. In fact, it is known that this building was first built as a hanikah by Emir Alaeddin Eretna, and that it served as a madrasah. In addition to its closed spaces, there is also the Dome built by Emir Eretna's wife Suli Pasha in the courtyard of this building. The subject of our article is the reliefs on the embrasures of this Dome. In this article, it is pointed out that these reliefs, which some researchers describe as stamps of stonemasons, are actually similar to three-slice crowns, and their iconography is emphasized. In the old Turkish beliefs, the meanings of the three-slice crown, which started with the protector of women and children Umay, kneaded with Islamic belief and mysticism, and the traces of the three-slice crown shape symbolizing these meanings are emphasized. The "three-slice crown" that we encounter in various materials, techniques and styles in different periods of Turkish Art is evaluated in the example of the Suli Pasha Dome.In this study, it is stated that the three-slice crowns, which are also seen in the ornaments on the gates, the pulpit and the altar in the mosques, are mostly found in the tombstones in Turkish Art. It is observed that the gravestones with three-slice crown are mostly women, although there is no gender discrimination. And it is emphasized that the surrender of the gravestones, which end with a three-slice crown, can be the expression of your faith as well as your last stop on the life journey of the grave owner. In the article; The crown, which is one of the important symbol parts of dervish clothing in Islamic Sufism, actually symbolizes the spiritual reign crown and in the absolute sense, It is reminded that Hz. Muhammad, who is a three-slice of the dervish crowns, symbolizes getting away from the interests of the world, striving for the sake of Allah, and even forgetting all the sacrifices made for it.It is stated that the reliefs in the form of a three-slice crown can symbolize the protector of the dead in this Dome, besides the surrender to Allah and his prophet with the reliefs on the porthole windows belonging to Suli Pasha of the Köşk Madrasah, and due to this feature.