Joint issue San Marino - Italy 550th Anniversary of borders determination Republic of San Marino – Italy

The Joint issue with Italy designed by Marco Biordi celebrates the “Patti di Fossombrone” (Pacts of Fossombrone)(1463) by which San Marino obtained the castles of Montegiardino, Fiorentino, Serravalle and subsequently also Faetano and became the territory we see nowadays. The souvenir sheet with four values shows the papal bull by which His Holiness Pius II ratified the clauses of the previous agreements between San Marino and the papal legate Cardinal.