Tenuta San Guido is named after the Saint Guido della Gherardesca who lived during the XI century. It is located on the Tyrrhenian coast, between Leghorn and Grosseto, in Maremma. Three are its defining characteristics: the Sassicaia wine, the Razza Dormello-Olgiata thoroughbred studfarm and the Bird Sanctuary Oasi di Bolgheri. They divide the estate between the Oasi on the coast, the horse's training grounds on the plain, and the vineyards planted up to 350 meters on the hills. The latter have been given their own DOC, the DOC Bolgheri Sassicaia, the first, and so far only case in Italy of a DOC contained in one estate.