The Kultobe citadel had a six-sided plan and was protected by a fundamental clay-brick with interior walls rooms at the bastion corners. The citadel wall fragment and tower approximately 65 meters long was discovered by archaeologists in 2019.
The citadel has a unique design and layout with angles of 120°. At the corners of the walls internal bastions with internal rooms were constructed. The central corridor divides the room into the left and right part. The base of the citadel is a christcross form and the citadel itself probably has several levels. The ceiling cornices and air hole that worked as ventilation of the construction are as evidence.
The building consisted mainly from the office and annexes. It shows that it was as administration. The premises of the building are interconnected by arched. The central element of the plan is a christcrosses. The ends of the “cross” are decorated in semicircles and on plans it has a quatrefoil form.
The construction of the inner part of the citadel in addition to the christcross castle are opened courtyards where frame constructions were installed. Probably wooden tents with ceilings made of textile or felt. These were temporary ritual structures that confirm the assumption of the cult/ sacred role of the first citadel. The ancient castle and palace construction is an important archaeological discovery. It makes possible to show the importance of Kultobe-Yasi city in the ancient and Early Medieval period.