Simwonsa (Yontan)  Simwŏn-sa is a Korean Buddhist temple located in Yŏntan-gun, North Hwanghae Province, North Korea. The temple contains one of the oldest wooden buildings in North Korea, as well as a famous peach tree and stupas from the late Koryo dynasty. Built in 1374, is the fourth oldest wooden building in North Korea, and houses a painting by the famous Neo-Confucian scholar Yi Saek. The hall is notable for its elaborate doors decorated with carved lotus blossoms, fish, birds, and snakes. The former monk's dormitory, this simple hall now houses the complex's caretakers.