Less handsome than its neighbours, this large monastery is nonetheless important and more of a 'working' wat. All Thai capitals have ritually required a royal temple of a holy relic (maha that), though the public cannot see its interior. It's also the first of Thailand's two Buddhist universities, founded in the 18th century. Later, Rama V donated a library. Its International Buddhist Meditation Centre runs meditation classes in English, Dhamma talks and retreats. From Sanam Luang, you enter through the neo-Khmer Thawornwatthu Building, designed by Prince Naris as a royal funerary hall.