Architecture of Mongolia
The Xiongnu confederation ruled present-day Mongolia from the third century BCE through the first century CE, living in portable, round tents on carts and round yurts. The Xiongnu aristocracy lived in small palaces, and their villages were protected by huge walls. S. I. Rudenko also mentions capital construction built of logs. Archaeological excavations indicate that the Xiongnu had towns; their chief city was Luut Hot (Dragon City).
Huyan
By the 3rd century BCE, the upper stratum of the Xiongnu was made up of five aristocratic houses, Luandi (house of the Chanyu and the Tuqi King of the east and west), Huyan, Xubu, Qiulin and Lan. Both the Huyan and Xubu settled in the east, Qiulin and Lan in the west and Luandi at the center of Mongolia.