Wat Yai Chaimongkon is located near the main Ayutthaya ruins and a short distance from the walls of Ayutthaya. It is famed for an impressively large statue of the Reclining Buddha inside the temple compound.
Built by King U Thong (Ayutthaya抯 first ruler) in 1357, the temple is also known as "Chao Phaya Thai Temple" and has a large Chedi that dominates the skyline. The Chedi was built in 1592 to celebrate King Naresuan抯 single-handed defeat of the then Burmese Crown Prince after an elephant back duel. The size of the Chedi was intended to match that of Phu Khao Thong - a Pagoda purportedly built by the Burmese which is visible in the distance from the temple. This is a great site to visit and wander around so give yourself plenty of time for a visit.