A learned Italian heraldist in Peter's service, Count Santi, associated the horseman with St. George as the patron saint of the prince who founded Moscow. In 1730, Santi prepared the first detailed description of the heraldic emblem of Moscow, which, drawing on the traditions of Western heraldry, named the horseman as St. George. In Santi's version of the emblem, set against the red field appears a white knight riding a silver horse and charging with his spear against a black dragon reminiscent of Zilant, a heraldic symbol of Muslim Kazan. With several minor modifications, this emblem was officially confirmed December 20, 1781, during Catherine II's municipal reform which involved standardization of the municipal heraldry.