King Chulalongkorn is regarded as one of the greatest kings of Siam. The Thai call him "The Great Beloved King" As the oldest son of king Mongkut, Prince Chulalongkorn succeeded hid father in 1868 at the age off fifteen. Because. of his immaturity, Chao Praya Si Suriyawong served as regent for four year. During this time, he traveled to neighboring western colonies including Singapore, Java and India, to study western politics, administration, lifestyle and colonialism. Later during his reign, he also visited Europe twice, in 1897 and 1907.