King Bhumibol Adulyadej was the world's longest-reigning and the country's revered monarch. Bhumibol, a constitutional monarch with no formal political role, was widely regarded as Thailand's unifying figure.
In Photos: The Reign of Thai King Bhumibol Adulyadej

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King Bhumibol Adulyadej (C) sits on the Royal Barge during the Royal Barge Procession on the Chao Phraya River in Bangkok, Nov. 4, 1999.

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King Bhumibol lights the flame for the 13th Asian Games, Dec. 3, 1998, during a ceremony at Chitrlada Palace, the King's residence, during a ceremony three days prior to the start of the games.

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Thai King Bhumibol Adulyadej receives a small rose plant from a woman as he makes a visit to one of his crop substitution projects in Northern Thailand, Feb. 16, 1981.

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King Bhumibol Adulydej and Queen Sirikit (left) talked to 100 demonstrators in Bangkok, Oct. 15, 1973, during demonstration which resulted in fall of Thanom Kittikachorn government.