When was belgium founded and who it?

The Kingdom of Belgium was founded in 1830 following the Belgian Revolution, which led to the secession of the southern provinces of the United Kingdom of the Netherlands. The provisional government was established on 24 September 1830 and the country's independence was formally recognized by the Treaty of London in 1839. The first King of the Belgians, Leopold I, took the oath on 21 July 1831.