Wat Phra Sri Sanphet (monastery) built
1350 CE.
Shown on the map at 14.356°, 100.558°.
Wat Phra Si Sanphet (Thai: วัดพระศรีสรรเพชญ์; "Temple of the Holy, Splendid Omniscient") was the holiest temple on the site of the old Royal Palace in Thailand's ancient capital of Ayutthaya until the city was completely destroyed by the Burmese in 1767, during the Burmese–Siamese War.
Text from the Wikipedia article Wat Phra Si Sanphet, licensed CC BY-SA 4.0.