The Italian GT Championship (Campionato Italiano Gran Turismo) is an Italian sports car series founded in 2003 and organized by the Automobile Club d'Italia (ACI) and the Commissione Sportiva Automobilistica Italiana (CSAI). It replaced a previous supercar-based championship which ran from 1992 until 2002 when it was folded due to a lack of entrants. The series borrowed heavily from the international FIA GT Championship in its first few seasons, although additional entries from Ferrari Challenge, Porsche Supercup, and Maserati Trofeo competitors were allowed.