Pizza estimated that annual production of pizza cheese was in the U.S. and in Europe. Authentic Neapolitan pizza ("pizza napoletana") is made with San Marzano tomatoes, grown on the volcanic plains south of Mount Vesuvius, and mozzarella di bufala Campana, made with milk from water buffalo raised in the marshlands of Campania and Lazio. This mozzarella is protected with its own European protected designation of origin. Other traditional pizzas include "pizza alla marinara", which is topped with marinara sauce and is supposedly the most ancient tomato-topped pizza, pizza capricciosa, which is prepared with mozzarella cheese, baked ham, mushroom, artichoke and tomato,
San Marzano Oliveto he became a Count of the Empire, and then in 1813 a senator and regent of Piedmont. During the Second World War, partisan resistance began earlier in San Marzano Oliveto than in other comuni in the region. On 24 and 25 December 1943, arriving first from Nizza Monferrato and later from Asti, soldiers of the Republic of Salò combed the area, searching every house for partisans. No partisans were found, but four hostages were taken and sent to Asti. The old emblem of the municipality is formed by a crenellated tower, topped by a crown (gold on blue) with the