Tenuta San Guido is an Italian winery in the DOC Bolgheri in Toscana, known as a producer of "Super Tuscan" wine. Its wine Sassicaia is considered one of Italy's top Bordeaux-style red wines. The estate also produces a second wine, Guidalberto, and the third wine Le Difese.
The owners of Tenuta San Guido are members of the Primum Familiae Vini.
Tenuta San Guido was established by Mario Incisa della Rochetta, of the Antinori family, behind one of Italy's most significant negociant firms, Considered the seminal Super Tuscan, the 1968 vintage of Sassicaia was the first Italian red made in the image of fine red Bordeaux.
Since the 1980s the reputation of Sassicaia was eclipsed by Ornellaia, produced by the property adjacent to Tenuta San Guido, suggested to be Lodovico Antinori’s competitive answer to his cousin Nicolò Incisa’s Sassicaia and his older brother Piero Antinori’s wine, Solaia.
In the late 1990s Sassicaia was granted its own DOC (Bolgheri), the only wine from a single estate in Italy to enjoy this privilege. Before that, and in similarity to other wines made outside the traditional DOC/DOCG regulations, Sassicaia was classified as an Indicazione geografica tipica (IGT). Initially it was a Vino da tavola, which is primarily a category for very simple wines.
Tenuta San Guido cultivates fruit from several plots scattered around Bolgheri extending 75 hectares (190 acres), with a grape variety distribution of 85% Cabernet Sauvignon and 15% Cabernet Franc. The annual production is approximately 180,000 bottles.
The most recent addition to the portfolio, La Difese, is composed of 70% Cabernet Sauvignon and 30% Sangiovese, with an annual production of 120,000 bottles.