Nikkō Tōshō-gū is a resplendent Shinto shrine in Nikkō, Tochigi Prefecture, Japan, that serves as a mausoleum for Tokugawa Ieyasu, the founder of the Tokugawa shogunate. Established in 1617, this shrine is part of the "Shrines and Temples of Nikkō," a UNESCO World Heritage Site, and is renowned for its elaborate architecture, including several National Treasures of Japan. Among its many intricate carvings, the shrine features the famous "see no evil, speak no evil, and hear no evil" monkeys, as well as the "sleeping cat" and the "Crying Dragon" painting, which produces a unique acoustic effect.