Ateo, meaning “atheist,” was first produced in the 1989 vintage. In this vintage, Ciacci decided not to produce a Brunello di Montalcino. The decision coincided with the first harvest of Merlot and Cabernet Sauvignon from their estate vineyards. The blend is 50% Merlot and 50% Cabernet Sauvignon, fermented in stainless steel and concrete vats.