Wat Phra Ram, วัดพระราม, may have been built in 1369 A.D. by King Ramesuen on the site where the remains of his father, the King of U-thong, had been cremated. However, since King Ramesuen reigned only one year, he could not have completed the building. The Wat was either completed by King Boromaraja I or that king may have permitted others to complete it. It is also possible that the Wat was built during the second accession of King Ramesuen after the death of Boromaraja I. The wat was renovated several times, notably by King Boromatrailokanat and again in 1741 during the reign of King Boromakot.

A large swamp lies in front of the temple. This swamp appears to have existed before the founding of the city and was called Nong Sano early on. The swamp may have been enlarged when earth was removed for leveling sites for the Royal Palace, Wat Phra Mahathat, Wat Rajaburana and Wat Phra Ram. In the Code of Palace Laws, the swamp is designated as "Bung Phra Ram". The swamp is now planted with lotus and is very beautiful during the blooming season.