State Duma

The State Duma, commonly abbreviated in Russian as Gosduma, is the lower house of the Federal Assembly of Russia, while the upper house is the Federation Council. The Duma headquarters are located in central Moscow, a few steps from Manege Square. Its members are referred to as deputies. The State Duma replaced the Supreme Soviet as a result of the new constitution introduced by Boris Yeltsin in the aftermath of the Russian constitutional crisis of 1993, and approved in a nationwide referendum.

In the 2007 and 2011 Russian legislative elections a full party-list proportional representation with 7% electoral threshold system was used, but this was subsequently repealed. The legislature's term length was initially 2 years in the 1993–1995 elections period, and 4 years in 1999–2007 elections period; since the 2011 elections the term length is 5 years.

Source: Wikipedia