Emperor Wu of the Liang Dynasty is said to have built the Da’aijing Monastery on Zhong Mountain (Zhong Shan). In the Southern Song Dynasty, the famous scholar Zhang Dunyi claimed in his Categorized Accounts of Events and Ruins of the Six Dynasties (Liuchao shiji bianlei) that the monastery was on the north peak, and later scholars have repeatedly accepted this view. However, by examining various records from the Six Dynasties and the Tang, the author has found that the Da’aijing Monastery is often placed at the foot, the west, the western foot, or the nearby bamboo ravine of Zhong Mountain, and not on its peak. This article investigates these sources and utilizes Google Map to identify a more accurate location of the Da’aijing Monastery on the basis of the Continued Biographies of Eminent Monks (Xu gaoseng zhuan). The author infers that the location of the monastery was on Tianbao Mountain, the west peak of Zhong Mountain, that is, in the vicinity of the present-day Purple Mountain Observatory (Zijinshan Tianwentai).