Believed to have been the oldest son of King Ramathibodhi the First, King Ramesuan was first the ruler of Lopburi when he was still the Prince. Prince Ramesuan headed the army which invaded Cambodia which, unfortunately, was not successful due to a number of attacks by the Siamese army. Later, after the death of King Ramathibodhi the First, Prince Ramesuan ascended the throne in 1369. He is also responsible for the building of Wat Phra Ram which can be seen if one embarks on a Chao Phraya cruise such as those organised by Anantara Cruises. As king, he attacked Chiang Mai and also established the Wat Phukhao Thong. However, he abdicated the throne in favour of his uncle, and re-ascended the throne after his demise. In the year 1395, King Ramesuan fell ill and passed away at the age of fifty-six. Following his passing, his son, Prince Ram, ascended the throne.