During the
Napoleonic Wars, the
Kingdom of Sweden had allied itself with the Russian Empire,
United Kingdom and the other parties against
Napoleonic France. However, following the
Treaty of Tilsit in 1807, Russia made peace with France. In 1808, and supported by
France, Russia successfully challenged Swedish control over Finland in the
Finnish War. In the
Treaty of Fredrikshamn on September 17, 1809, Sweden was obliged to cede all its territory in Finland, east of the
Torne River, to Russia. The ceded territories became a part of the Russian Empire and was reconstituted into the
Grand Duchy of Finland, with the Russian tsar as the grand duke. In 1812, the area of Vyborg Governorate was transferred from Russia proper to the grand duchy and established as
Viipuri Province. The transfer, announced by Tsar
Alexander I just before Christmas, on December 23, 1811
O.S. (January 4, 1812
N.S.), can be seen as a symbolic gesture and an attempt to appease the sentiment of the Finnish population, which had just experienced Russian conquest of their country by force in the
Finnish War. Some of the legal developments in Sweden during the 18th century had not been introduced in Old Finland: the Viipuri and Käkisalmi territory did not adopt the 1734 General Law of Sweden (though
Hamina (Fredrikshamn),
Lappeenranta (Villmanstrand), and
Savonlinna (Nyslott), at the time still Swedish, of course did adopt it), and the new
constitution of King
Gustav III was not implemented in the entire area. After integration, the inhabitants of Old Finland were gradually brought under the same legal system as the rest of the grand duchy, including its
Constitution and General Law, although some privileges took time to implement. The so-called
donated estates (owned by
Russian noblemen) in Karelia were a headache resolved slowly by monetary compensation from the Grand Duchy's Treasury. This was a long lasting burden, as the last instance of compensation was not until the 1870s. == Governors ==