When was Bangkok founded?
History of Bangkok
1972
Administratively, eastern Bangkok and Thonburi had been established as separate provinces in 1915. (The province east of the river was named Phra Nakhon (พระนคร.) A series of decrees in 1971–1972 resulted in the merger of these provinces and its local administrations, forming the current city of Bangkok which is officially known in Thai as Krung Thep Maha Nakhon. The Bangkok Metropolitan Administration (BMA) was created in 1975 to govern the city, and its governor has been elected since 1985.[14]