Coronation and titles
Bhumibol was crowned King of Thailand on 5 May 1950 at the Royal Palace in Bangkok where he pledged that he would "reign with righteousness for the benefit and happiness of the Siamese people"
. On 9 June 2006, Bhumibol celebrated his 60th anniversary as the King of Thailand, becoming the longest reigning monarch in Thai history.
Following the death of his grandmother Queen Savang Vadhana, Bhumibol entered a 15-day monkhood (22 October 1956 – 5 November 1956) at Wat Bowonniwet, as is customary for Buddhist males on the death of elder relatives. During this time, Sirikit was appointed his regent. She was later appointed Queen Regent (Somdej Phra Boromarajininat) in recognition of this. Although Bhumibol is sometimes referred to as King Rama IX in English, Thais refer to him as Nai Luang or Phra Chao Yu Hua ( both mean "the King" or "Lord Upon our Heads"). He is also called Chao Chiwit ("Lord of Life"). Formally, he would be referred to as Phrabat Somdet Phra Chao Yu Hua or, in legal documents, Phrabat Somdet Phra Paraminthara Maha Bhumibol Adulyadej , and in English as His Majesty King Bhumibol Adulyadej. He signs his name as Bhumibol Adulyadej Por Ror this is the Thai equivalent of Bhumibol Adulyadej R[ex].