Wat Phra Si Rattana Mahathat, known among the locals as "Wat Yai", was founded in 1357 by King Lithai of Sukhothai. It is located at the foot of Naresuan Bridge on the bank of the Nan River.
The temple is very famous because of its golden buddha image called Phra Phuttha Chinnarat, which is considered by some Thais to be the most beautiful buddha image in the country.
Thonburi (west side of the river) was a Siamese capital after the downfall of the Ayutthaya. Thonburi existed for 14 years and in 1782, King Rama I relocated the capital to Bangkok (on the other side of the Chao Phraya River), thus bringing the Thonburi kingdom to an end. The city of Thonburi remained an independent town until it was merged into Bangkok in 1971.