The palace of the Terra Empire was located in the capital's inner city. It was a group of castles that occupied a large area. The main castle was the most towering and eye-catching, and it served as the administrative core of the King and the Imperial Council's exercise of power. There were four castles around it, each with its own uses. They were connected to each other by bridges.
A high wall separated the palace from the civilians. It was heavily guarded, and outsiders were not allowed to enter.
In the mouths of the people of the capital, this castle was usually called the "Golden Fortress." The meaning of this name was mainly to praise the spirit of the royal family of Tarn. In fact, there was nothing golden about the palace castle at all. Instead, it was blue in color. The outer walls were hung with flags with the Tarn family's emblem and the Empire's mark.