19th-century Thai monarchs

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.

Mongkut (18 October 18041 October 1868), posthumously honoured as King Mongkut the Great, was the fourth king of Siam from the Chakri dynasty, titled Rama IV. He reigned from 1851 until his death in 1868.

King of Siam (1737–1809)

Third king of Siam of the Chakri Dynasty

King of Siam

Kawila (, , , 31 October 17421816), also known as Phra Boromrachathibodi (; ), was a Northern Thai ruler and the first monarch of Chiang Mai of the Chet Ton (Thipchakrathiwong) dynasty, and the leader of the restored polity in Lanna. His reign was shaped by near-constant warfare alongside large-scale efforts to rebuild towns, repopulate settlements, and restore administration across the "57 Lanna Tai cities."

Inthawichayanon (; , , IAST: , ; , c. 1817 – 23 November 1897) was the 7th Ruler of Chiang Mai and Head of Lan Na from 1870 until his death in 1897. His daughter, Princess Dara Rasmi of Chiang Mai, became King Rama V's Princess Consort. During his reign, the ties of the previously independent tributary state with the central government in Bangkok were intensified, culminating in the creation of the Monthon Phayap in 1892, by which Lan Na was formally annexed.