Kingdom of Korea from 918-1392 AD; the dynasty lasted from 935-1392. It turned to Buddhism in adversity, built many temples, and made exquisite Celadon objects. Koryo's close cultural ties with China during the Sung period (960-1279) resulted in direct influences from the advanced Chinese urban culture. The peace of the realm was often disrupted by invaders from Manchuria, first Khitan, then Juchen, and finally by the Mongols. In 1232, the Koryo court fled to Kanghwa Island off the west coast of Korea, leaving the country to Mongol devastation and control. The art of Koryo never again equaled its pre-Mongol achievements. It is from the name Koryo that the Western word Korea is derived.