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).
Turkic migration
Apparently the Xiongnu comprised a number of tribes and geographic groups, not all of which were probably Turkic (considering the later mixed ethnicity). The "Records of the Grand Historian" mention the Mianshu, Hunrong and Diyuan west of Long; the Yiqu, Dali, Wiezhi and Quyan north of the Qi and Liang mountains and Jing and Qi Rivers; the Forest Barbarians and Loufan north of Jin and the Eastern Barbarians and Mountain Barbarians north of Yan. Later the treatise mentions others.