Wat Phra Chetuphon, known as Wat Pho is one of the largest and oldest (16th century) wats in Bangkok (with an area of 50 rai, 80,000 square metres). It is home to more than one thousand Buddha images, as well as one of the largest single Buddha images of 46 m (150′) length: the Reclining Buddha (Phra Buddhasaiyas). The grounds contain 91 chedis (stupas), four wihans (halls) and a bot (central shrine). 71 chedis of smaller size contains the ashes of the royal family, and 21 large ones contain the ashes of Buddha. The four chedis are dedicated to the four Chakri kings.