During the Sukhothai, Most literary works were written in simple prose with certain alliteration schemes. Major works include King Ram Khamhaeng Inscription. King Ram Khamhaeng's Stone Inscription is considered the first Thai literary work in Thai script. It gives an account of the life of King Ramkhamhaeng the Great, the way of life of Thai people in general, laws, religion, economic and political stability. "Trai Phum Phra Ruang", was written in 1345 by King Maha Thammaracha I, the fifth king of Sukhothai. It expounds Buddhist philosophy based on a profound and extensive study with reference to over 30 sacred texts. The work could be considered the nation's first piece of research dissertation. It was written in beautiful prose rich in allusions and imagery. It is a treatise on Buddhist cosmology, ethics, biology and belief system.