Wat Pho is a Buddhist temple complex in the Phra Nakhon District, Bangkok, Thailand. It is on Rattanakosin Island, directly south of the Grand Palace. Known also as the Temple of the Reclining Buddha, the temple is first on the list of six temples in Thailand classed as the highest grade of the first-class royal temples. It is associated with King Rama I who rebuilt the temple complex on an earlier temple site, and became his main temple where some of his ashes are enshrined. The temple was later expanded and extensively renovated by Rama III. The temple complex houses the largest collection of Buddha images in Thailand, including a 46 m long reclining Buddha. The temple is considered the earliest center for public education in Thailand, and the marble illustrations and inscriptions placed in the temple for public instructions has been recognized by UNESCO in its Memory of the World Programme. It houses a school of Thai medicine, and is also known as the birthplace of traditional Thai massage which is still taught and practiced at the temple.