 The structures inscribed are some of the oldest extant wooden buildings in the world, dating from the 7th to 8th centuries.Many of the monuments are also National Treasures of Japan, and reflect an important age of Buddhist influence in Japan.The structures include 21 buildings in the Hōryū-ji East Temple, 9 in the West Temple, 17 monasteries and other buildings, and the pagoda in Hokki-ji.