The two main groups of caves are known as Northern and Southern Xiangtangshan. The Northern Group, Bei Xiangtang, is the earliest and largest in scale and has three caves begun with imperial sponsorship; the Southern Group, Nan Xiangtang, has smaller caves numbered from one to seven; and a third site at Shuiyusi, also known as Xiao Xiangtang or “Little Xiangtang,” has one Northern Qi cave with sculptures.