Supreme Patriarch Somdet Phra Nyanasamvara died yesterday due to a blood infection following recent surgery for an intestinal infection, according to Chulalongkorn hospital where he had been receiving treatment.
Hundreds of mourners lined the busy six-lane road today outside the hospital, from where the body of the kingdom's top Buddhist leader was due to be transported to a temple in the capital for religious ceremonies.
People of all ages, from school boys to frail old women, crouched respectfully next to the heavy traffic. Most dressed in the mourning colours of black or white.
He was appointed Supreme Patriarch in 1989 by King Bhumibol Adulyadej, who was "very sad" to hear of his passing, according to the royal household bureau, which was instructed by the monarch to mourn for 30 days.
Government offices and places of education were asked to fly flags at half mast for three days and civil servants were instructed to observe 15 days of mourning, according to Prime Minister Yingluck Shinawatra's office.
Last year the World Fellowship of Buddhists bestowed the title of "Sangha Leader of the Buddhist World" on the Supreme Patriarch at a meeting in Japan.
Buddhism is Thailand's state religion and around 95 per cent of the population is believed to follow it - the highest percentage in the world.
Figures released last year by the National Office of Buddhism showed Thailand had more than 61,000 monks.
