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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Well-wishers pray for King Bhumibol Adulyadej at the Siriraj hospital in Bangkok, where he is hospitalized, Oct. 12, 2016.

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King Bhumibol Adulyadej and Queen Sirikit leave Siriraj hospital in Bangkok, Aug. 1, 2013.

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In this photo released by Thailand's Royal Household Bureau, Thai King Bhumibol Adulyadej, second from left, along with Crown Prince Vajiralongkorn, third from left, Princess Chulabhorn, Princess Sirindhorn, and Consort Princess Srirasm, right, arrive at Klai Kangwon Palace before a ceremony in celebration of the king's 86th birthday in Prachuap Khiri Khan province Thailand, Dec. 5, 2013.

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This undated handout photo received 26 Dec. 2002 shows Thai King Bhumibol Adulyadej and his dogs at the Royal Palace in Bangkok. The tale of a stray dog born that won the heart of the country's much-loved king has recently become the nation's latest publishing sensation.