The Thonburi Kingdom was a major Siamese kingdom which existed in Southeast Asia from 1767 to 1782, centered around the city of Thonburi, in Siam or present-day Thailand. The kingdom was founded by Taksin the Great, who reunited Siam following the collapse of the Ayutthaya Kingdom, which saw the country separate into five warring regional states. The Thonburi Kingdom oversaw the rapid reunification and reestablishment of Siam as a preeminient military power within mainland Southeast Asia, overseeing the country's expansion to its greatest territorial extent up to that point in its history, incorporating Lan Na, the Laotian kingdoms, and Cambodia under the Siamese sphere of influence.
Taksin's coronation at Thonburi (Bangkok), 28 Dec 1767
Siamese invasion of Cambodia and Hà Tiên in 1771 and Vietnamese counter-offensives in 1772.
Kawila of Lampang, vassal lord of Lampang to Taksin and the first two Chakri monarchs, helped to repopulate Lan Na in the late 18th-early 19th centuries
The Rattanakosin Kingdom, the Kingdom of Siam, or the Bangkok Empire, were names used to reference the fourth and current Thai kingdom in the history of Thailand. It was founded in 1782 with the establishment of Rattanakosin (Bangkok), which replaced the city of Thonburi as the capital of Siam. This article covers the period until the Siamese revolution of 1932.
View of the city of Bangkok in 1822
Photograph of King Mongkut (Rama IV) (r. 1853–1868) in western style uniform
Coronation of King Norodom of Cambodia at Oudong in June 1864
Somdet Chaophraya Si Suriyawong (Chuang Bunnag) emerged to prominent roles after Bowring Treaty of 1855, became regent of young King Chulalongkorn in 1868, given highest rank of Somdet Chaophraya in 1873, and retained powers until his death in 1883.