Itsukushima Shrine is a UNESCO World Heritage Site cultural heritage site registered since 1996. Several buildings in the Itsukushima shrine complex and heirloom objects owned by Itsukushima shrine, including the Heike Nōkyō silk, are listed as National Treasures of Japan. The Heike Nōkyō Sutra belonging to Itsukushima Temple was a gift from the Taira clan in 1164.