Established in 1948 by Marchese Mario Incisa della Rocchetta, Tenuta San Guido is a super-premium Italian wine producer with 75 hectares of vineyards in the Bolgheri DOC  in Tuscany. Best known for producing "Super Tuscan" wines, its flagship wine Sassicaia is considered one of Italy's leading Bordeaux-style reds. Prior to 1994, Sassicaia was classified as a simple Indicazione Geografica Tipica (IGT) as it was made from non-traditional varieties for the region and thus was excluded from DOC status.  To rectify the situation, Sassicaia was granted its own DOC (Sassicaia DOC) in 1994, the only wine from a single estate in Italy to enjoy this privilege. Alongside Sassicaia, Tenuta San Guido also produces a second wine; a Cabernet Merlot Sangiovese blend called Guidalberto.