Next to the Reclining Buddha wiharn is an enclosure holding the four largest of the temple's 95 chedis, each 42m high. All of the chedi at Wat Po are square, rather than the round bell shape generally preferred at the time. They are decorated with ceramic tiles and three dimensional ceramic pieces which form intricate floral patterns. The centre of the three chedi in a line is the oldest, having been built by Rama I to hold the Phra Si Sanphet Buddha image bought from Ayuthaya. Later, Rama III built the chedi north of this to hold the ashes of Rama II, and the one to the south to hold his own remains. The fourth chedi was built by Rama IV for unknown purposes.