Flag of Sardinia Cagliari. The late 14th century Gelre Armorial attributes the Four Moors to the Kingdom of Sardinia in the states of the Crown of Aragon. It is found in another Armorial perhaps from Lorraine area (preserved in the National Library of France) and of uncertain date but certainly in the 15th century. In 1509, another Portuguese Armorial Book (Livro do Armeiro-mor). Sardinia is represented only with the cross of St. George. The Four Moors begin to be used consistently as a symbol of the Kingdom of Sardinia during the time of the Catholic Monarchs, and especially from the time of the
Kingdom of Sardinia of the Duchy of Milan, while Charles VI (the Holy Roman Emperor and Archduke of Austria), received the Spanish Netherlands, the Kingdom of Naples, Sardinia, and the bulk of the Duchy of Milan. During the War of the Quadruple Alliance, Victor Amadeus II, Duke of Savoy and Prince of Piedmont, had to agree to yield Sicily to the Austrian Habsburgs and receive Sardinia in exchange. The exchange was formally ratified in the Treaty of The Hague of 17 February 1720. Because the kingdom of Sardinia had existed since the 14th century, the exchange allowed Victor Amadeus to retain the title