The pure party-list proportional representation was the traditional electoral system of the Italian Republic since its foundation in 1946, so it had been adopted to elect the Italian representatives to the European Parliament too. Two levels were used: a national level to divide seats between parties, and a constituency level to distribute them between candidates. Italian regions were united in 5 constituencies, each electing a group of deputies. At national level, seats were divided between party lists using the largest remainder method with Hare quota. All seats gained by each party were automatically distributed to their local open lists and their most voted candidates.