Grand Duchy of Finland ||This article includes a list of
references, but its sources remain unclear because it has
insufficient inline citations. (April 2009)| |Grand Principality
of Finland Suomen suuriruhtinaskunta (fi) Storfurstendömet
Finland (sv) Великое княжество Финляндское (ru) Velikoye
knyazhestvo Finlyandskoye |Autonomous state of the Russian
Empire| Maamme / Vårt land The Grand Principality of Finland in
1914. |Languages||Swedish, Finnish, Russian| |Religion||Finnish
Orthodox, Evangelical Lutheran| |-||1809||Georg Sprengtporten
(first)| |-||1917||Nikolai Nekrasov (last)| |-||1822–1826||Carl
Erik Mannerheim (first)| |-||1917||Anders Wirenius (last)|
|-||Diet of Porvoo||29 March 1809| |-||Treaty of
Fredrikshamn||17 September 1809| |-||Independence declared||6
December 1917| |-||1910||360,000 km² (138,997 sq mi)|
|Density||8.2 /km² (21.2 /sq mi)| |Today part of|| Finland The
Grand Duchy of Finland (literally Grand Principality of Finland;
Finnish: Suomen suuriruhtinaskunta, Swedish: Storfurstendömet F