The name "Vernaccia" is applied to several different Italian grapes, such as the Sardinian grape used in "Vernaccia di Oristano" and the Marche grape used in the sparkling red wine "Vernaccia di Serrapetrona". Ampelographers have determined that the variety grown in San Gimignano is different and distinct from the other Italian Vernaccias and is probably not related. The Tuscan variety is believed to be the oldest grape variety but its origins are not clear with ampelographers disagreeing if it originally came from Eastern Europe, Greece or is indigenous to the Italian peninsula.