After the death of King Chulalongkorn in 1910, the relationship with his successor King
Vajiravudh was less productive. Prince Damrong finally resigned in 1915 from his post at the ministry, officially due to health problems, since otherwise the resignation would have looked like an affront to the
monarch. During the brief reign of King
Prajadhipok, the prince proposed that the king found the Royal Institute, mainly to look after the National Library and the museums. He became the first president of
the Royal Institute of Thailand. He was given the title
Somdet Phra Chao Borommawong Thoe Krom Phraya Damrong Rajanubhab by King Prajadhipok in recognition to his work. This became the name by which he is generally known. In the following years, Damrong worked as a self-educated historian, as well as writing books on Thai literature, culture and arts. Out of his works grew the
National Library, as well as the
National Museum. He is considered the father of Thai history. The "Damrong school" has been characterized by Thai historian Nithi Aeusrivongse as combining "the legacy of the royal chronicle with history as written in the West during the nineteenth century, creating a royal/national history to serve the modern Thai state under the absolute monarchy." Although foundational to Thai history, his work is now often seen as overly nationalistic and exclusive of marginalized actors. Being one of the main apologists for
absolute monarchy, after the
Siamese revolution of 1932 which introduced
Constitutional monarchy in the kingdom, Damrong was exiled to
Penang in British
Malaysia. In 1942, after the old
establishment had substantially regained power from the 1932 reformists, he was allowed to return to Bangkok, where he died one year later. Prince Damrong is credited as the father of Thai history, the education system, the health system (the Ministry of Health was originally a department of the Ministry of the Interior) and the provincial administration. He also had a major role in crafting Bangkok's anti-democratic state ideology of "
Thainess". On the 1962 centenary of his birth, he became the first Thai to be included in the
UNESCO list of the world's most distinguished persons. On 28 November 2001, to honour the contributions the prince made to the country, the government declared that 1 December would thereafter be known as "Damrong Rajanupab Day". His many descendants use the royal surname
Tisakula or
Diskul (). ==Writings==