The Italian Bourse (Borsa Italiana S.p.A.), based in Milan, is Italy's stock exchange. It manages and organises domestic market, regulating procedures for admission and listing of companies and intermediaries and supervising disclosures for listed companies. Borsa Italiana is also informally known as Piazza Affari ("Business Square"), after the city square of Milan where its headquarters (the Palazzo Mezzanotte building) is located.