Norway is divided into 19 counties, and all MPs represent their own county. The voting system is called Proportional Representation, which means each county elects a number of MPs from several parties according to the number of votes cast by its voters. The capital Oslo has the most MPs (17).
Elections are held every four years, and every Norwegian over the age of 18 has the right to vote. The largest parties are the Labour Party (Arbeiderpartiet), the Conservatives (Høyre) and the Progress Party (Fremskrittspartiet). The parliament building is situated in central Oslo, facing the Royal Palace across a park.