San Marino participates in the celebrations of the sixth centenary of Federico da Montefeltro’s birth, perfect renaissance gentleman and champion of enlightened humanism. The souvenir sheet represents the famous work of art “Dittico dei Duchi d’Urbino”, with Federico d’Urbino and his wife Battista Sforza’s profiles, preserved at the Uffizi Galleries in Florence. By concession of: Ministry of Culture - Photography Cabinet of the Uffizi Galleries