One of the four major grottoes of China and a UNESCO World Heritage Site, the Longmen Grottoes are a trove of 1000 years of Buddhist art treasures. Bounded by the Yi River, the caverns are divided into two sections at East Hill and West Hill. The caverns at East Hill contain mostly Tang dynasty (618-907) works, while the caverns at West Hill were cut out during the Northern, Sui, and Tang dynasties and contain the carvings that are most representative of the site. The Buddha and bodhisattva sculptures that inhabit the caverns are carved into an endless variety of poses and expressions of mercy and kindness, while the caves themselves lend a stately and dignified atmosphere. The artistry of these sculptures is truly a priceless inheritance of Buddhist art.