From Firenze:
From "Firenze-Certosa", proceed to "Siena-Firenze" (turn to the right after the highway tollbooth of A1 "Milano-Roma"). After about an hour (65 Km), exit at "Siena-Nord" towards Stellino (on the right after the exit). Keep going towards "Centro Storico" and "via Garibaldi" (area "Due Lupe").
From highway A1, "Roma-Milano":
From the exit "Val di Chiana", proceed towards "Siena-Bettolle". After an hour (about 70 Km) exit at the Siena bypass ("tangenziale"), and keep going as far as "Siena Nord" towards Stellino (on the right after the exit). Keep going towards "Centro Storico" and "via Garibaldi" (area "Due Lupe").