A Duma is any of various representative assemblies in modern Russia and Russian history. The State Duma in the Russian Empire and Russian Federation corresponds to the lower house of the parliament. Simply it is a form of Russian governmental institution, that was formed during the reign of the last Czar, Nicholas II.

The State Duma in Russia is the lower house of the Federal Assembly of Russia (parliament), the upper house being the Federation Council of Russia. Under Russia's 1993 constitution, there are 450 deputies of the State Duma (Article 95), each elected to a term of four years (Article 96); this was changed to a five-year term in late 2008. In previous elections of 1993, 1995, 1999 and 2003 one half of the deputies were elected by a system of proportional representation and one half were elected by plurality in single member districts. However, the 2007 Duma elections were carried out in a new format: all 450 deputies were elected by a system of proportional representation. Russian citizens at least 21 years old are eligible to run for the Duma (Article 97).

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