Prime Minister's Office (Finland)
The Senate of Finland was founded on 18 August 1809 in the Grand Duchy of Finland when Emperor Alexander I of Russia signed a standing order on its establishment at Peterhof Palace. The Senate was initially called the Governing Council until it was renamed as the Senate in 1816. The Senate of Finland was divided into the Economic and Judicial Divisions; the Economic Division was further divided into departments, such as the Office Administrative Department (; ). On 1 October 1892, the Office Administrative Department was disbanded and the modern equivalent position of Prime Minister in the Senate, the Vice-Chairman of the Economic Division, was granted a support office in its place. The new unit was called the Office of the Economic Division (; ). Following Finnish independence in 1917, the unit was renamed as the Prime Minister's Office on 27 November 1918 with the operations and staff remaining intact.
Grand Duchy of Finland
The formation of the Grand Duchy stems from the Treaty of Tilsit between Tsar Alexander I of Russia and Napoleon Bonaparte of France. The treaty mediated peace between Russia and France and allied the two countries against Napoleon's remaining threats: Great Britain and Sweden. Russia invaded Finland in February 1808, claimed as an effort to impose military sanctions against Sweden, but not a war of conquest, and that Russia decided to only temporarily control Finland. Collectively, the Finnish were predominately Anti-Russian, and Finnish guerillas and peasant uprisings were a large obstacles for the Russians, forcing Russia to use various tactics to quash armed Finnish rebellion. Thus, in the beginning of the war, General Friedrich Wilhelm von Buxhoeveden, with permission of the Tsar, issued an oath of fealty on Finland, in which Russia would honor Finland's Lutheran faith, the Finnish Diet, and the Finnish estates as long as the Finns would remain loyal to the Russian crown. The oath also dubbed anyone person who gave aid to the Swedish or Finnish armies a rebel.