'The Palace, a complex of several connected and adjacent buildings and courtyards, was constructed (and embellished) by several generations on a wide artificial terrace during a four century period ((250-800 AD). ... It was equipped with numerous large baths and saunas which were supplied with fresh water by an intricate water system. An aqueduct, constructed of great stone blocks with a three-meter-high vault, deviates the Otulum River to flow underneath the main plaza. The Palace is the largest building complex in Palenque measuring 97 meters by 73 meters at its base'. Wikipedia.