Nakhon Pathom, 60km west of Bangkok, is regarded as the oldest city in Thailand and is host to the 127m, orange-tiled Phra Pathom Chedi, the tallest Buddhist monument in the world. The original monument, now buried within the massive orange-glazed dome, was erected in the 6th century by Theravada Buddhists. The chedi has endured various incarnations at the hands of Khmer, Burmese and Chinese refurbishers. There is a floating market nearby at Khlong Damnoen Saduak.