The exact date of construction of the fortress, which was established on a low hill in the south of the city, dominated the plain, is unknown. 17th century. Evliya Çelebi from Çorum tells us that the castle was a Seljuk structure built by Sultan Kılıç Arslan.

The main entrance of the fortress is provided by the door opening from the rectangular exit in the middle on the north side. When you enter the door, there is a room on the right and left sides. These rooms belong to the castle guard on the left and the right is used as a dungeon. The first written documents belonging to Çorum Fortress, which has the characteristic of Seljuk architecture, are dated to 1571 (H. 979). M. 1577 (H. 985) dated from the castle "Sultan Suleyman Hayrati" is referred to as. 16th century. Evliya Çelebi, who came to Çorum, said that the fortress of the city in the direction of Qibla was a Seljuk structure built by Sultan Kılıç Arslan. The same year the traveler W.J. Hamilton states that the square-planned fortress structure built on a hill in the southeast of the city was built by Sultan Süleyman. Smooth cut stone, rubble stone and spolia stones belonging to Roman-Byzantine periods were used as building materials. The castle is housed in a small mosque with dwellings.