About Chulalongkorn
Chulalongkorn (20 September 1853 – 23 October 1910), posthumously honoured as King Chulalongkorn the Great, was the fifth king of Siam from the Chakri dynasty, titled Rama V. Chulalongkorn's reign from 1868 until his death in 1910 was characterised by the modernisation of Siam, governmental and social reforms, and territorial concessions to the British and French empires. As Siam was surrounded by European colonies, Chulalongkorn, through his policies and acts, ensured the independence of Siam. Chulalongkorn was born as the son of Mongkut, the fourth king of Siam. In 1868, he travelled with his father to observe the solar eclipse of 18 August 1868 in Prachuap Khiri Khan Province. During that trip, Chulalongkorn and his father both contracted malaria which resulted in his father's death, and his accession to the throne. The 1893 Franco-Siamese crisis and Haw wars took place during his reign. All his reforms were dedicated to ensuring Siam's independence given the increasing encroachment of Western powers. Chulalongkorn's success earned him the epithet Phra Piya Maharat or the Great Beloved King. Chulalongkorn became friends with her son Louis, which continued into their adulthood.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.