The Senate of the Republic (Italian: Senato della Repubblica), or simply the Senate (Italian: Senato), is the upper house of the bicameral Italian Parliament, the lower house being the Chamber of Deputies. The two houses together form a perfect bicameral system, meaning they perform identical functions, but do so separately. Pursuant to the Articles 57, 58, and 59 of the Italian Constitution, the Senate has 200 elective members, of which 196 are elected from Italian constituencies, and 4 from Italian citizens living abroad. Furthermore, a small number (currently 5) serve as senators for life (senatori a vita), either appointed or ex officio. It was established in its current form on 8 May 1948, but previously existed during the Kingdom of Italy as Senato del Regno (Senate of the Kingdom), itself a continuation of the Senato Subalpino (Subalpine Senate) of Sardinia established on 8 May 1848. Members of the Senate are styled Senator or The Honourable Senator (Italian: Onorevole Senatore) and they meet at Palazzo Madama, Rome.