Three Enclosures
The Three Enclosures are the Purple Forbidden Enclosure (紫微垣, Zǐ Wēi Yuán), the Supreme Palace Enclosure (太微垣, Tài Wēi Yuán) and the Heavenly Market Enclosure (天市垣, Tiān Shì Yuán). The Purple Forbidden Enclosure occupies the northernmost area of the night sky. From the viewpoint of the ancient Chinese, the Purple Forbidden Enclosure lies in the middle of the sky and is circled by all the other stars.
The Supreme Palace Enclosure lies east and north to the Purple Forbidden Enclosure, while the Heavenly Market Enclosure lies west and south. The Three Enclosures are separated by "walls", which are asterisms with their shapes resembling their namesakes.
Read more about this topic: Chinese Constellations