In the central part of the hill, north of the Patriarchate, is the Palace complex, built by Tsar Ivan Alexander around 1360. It is a collection of buildings, including a throne room, a palace church and royal apartments. It is surrounded by an inner stone wall, two battle towers and two entrances, on the north and south. According to the life of Theodosius Turnovski, the council against the Jews convened by Tsar Ivan Alexander in 1360 took place in this palace. Its shape is an irregular ellipse with dimensions of 114 m by 66 m, and the total area is about 5000 sq. m.
The palace was protected by a fortress wall and towers like a typical medieval castle. The main entrance was from the north and was protected by three towers. In front of him was a large square. The rooms in the palace were located along the walls, and in the middle was a vast courtyard. In the western part near the northern entrance there were two representative rooms connected by a common facade.
These were the throne room and reception rooms, decorated with marble and frescoes. The royal chambers were located on the east wall between the north and south entrances. The lower floors were cellars and probably dungeons. They were accessed by stairs from the upper floors.
Next to the southern fortress wall stood another building, which was the dining room of the palace, and in the western part was the kitchen with three brick ovens. Next to the northern and southern palaces were the quarters of the guard.
In the northeastern part of the yard was the reservoir. There was also a system of sewers for sewage and rainwater. In the eastern part of the courtyard was the palace church, which was cross-domed