Ulu Mosque, Sultan Mosque Kayseri, which has been the scene of many historical events since the ages, is also important in terms of ancient artifacts. Western travelers who came to the city in the XIX. Century, gave information about the ancient artifacts in the city. In the works of these travelers, the works belonging to the Islamic revolution are missing or they have written incorrect information about their details. The mentioned works were first described by Halil Ethem Bey, briefly described in terms of archeology and architecture, but recently by Albert Gabriel. Almost all of the works that survive today in Kayseri remain from the time of Turkish domination. It was built in the time of the Danishmends and the Seljuks in the XII –XIII centuries, and in the Ottoman period, these buildings were built. Most of these historic buildings have been ruined due to destruction and lack of care, some have completely disappeared, and some have lost their orginance with reparations. In terms of ornamentation, it does not contain as much tile and carvings as the artifacts in Konya and Sivas, and it has a simple feature. In these works the ornaments are generally used in the sections such as the gate, the altar, the moldings.
The earliest inscription found by Halil Ethem Bey belongs to the Hoca Hasan Madrasah, which carried the history of H.589 / M.1193 and is now completely devastated. The oldest of the existing Turkish works is the Ulu Mosque from the Danishmends time. The Sultan Mosque, the Ulu Mosque, also referred to as the Cami–i Kebir, is the largest mosque of the period with a size of 35 x 50 m, but lost its qualities after Hunat Mosque was built. The dam was flat in 43 arches and covered with soil during his period. Rumors about the Ulu Mosque being a converted mosque from the church can be explained by the fact that some of the pillars used in the construction of the mosque have been moved from old buildings and have been built instead of a church. Melik Ghazi Madrasah on the side of the glass, there is a mausoleum which is thought to belong to Melik Ghazi. It was built in the time of Danishmend Melik Muhammad Ghazi (1134–1143). Later on, during the reign of Seljuk I.
Gıyaseddin Keyhüsrev, there was a bishop of 1205 orders that he was repaired by Muzafferüddin Mahmud bin Yağıbasan. Evliya Çelebi, who travels to Kayseri, says that this is the oldest mosque in the city, and that it is unique with its minaret. The facility also has been seen in places repairs, with the domes and arches of the impact of the earthquake that occurred in 1716, columns and walls collapsed, the 1722 date after staying five years disrepair Matbah–i Amire Emiri Hacı Halil zoning renewed old architectural shape by the Lord and was built.