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.
Diet of Finland
During the Finnish War between Sweden and Russia, the four Estates of occupied Finland ("Nobility, Clergy, Bourgeoisie and Peasants") were assembled at Porvoo "(Borgå)" by Tsar Alexander I, the new Grand Duke of Finland, between 25 March and 19 July 1809. The central event at Porvoo was the sovereign pledge and the oaths of the Estates in Porvoo Cathedral on 29 March. Each of the Estates swore their oaths of allegiance, committing themselves to accepting the Emperor and Grand Duke of Finland as the true authority, and to keeping the constitution and the form of government unchanged. Alexander I subsequently promised to govern Finland in accordance with its laws. This was thought to essentially mean that the emperor confirmed the Swedish Instrument of Government from 1772 as the constitution of Finland, although it was also interpreted to mean respecting the existing codes and statutes. The diet had required that it would be convened again after the Finnish War, which separated Finland from Sweden, had been concluded. On 17 September that year, the conflict was settled by the Treaty of Fredrikshamn, but it would be another five decades until the Finnish Estates would be called again.