The Ottoman army failed to seize the island. The experience served the German strategist at the services of Venice to fortify the two dangerous heights of Abraham and St. Salvatore. The idea had already been formulated previously by other experts such as Napoleon Francesco Eraut (1682). The purpose of the work was to protect the defensive line from the enemy cannonades, stretched between the fortress erected by Ferrante Vitelli (1575-1577) and the seventeenth-century bulwarks Valier and Sant’Antonio. The work, begun following the peace of Passarowitz (1718) which sanctioned the loss of the surviving ports of Crete, continued due to some variations until 1751. Once finished, Corfu was certainly one of the most well-equipped squares in the Mediterranean. The "Adriatic door" showed threateningly an urban landscape dominated by the reasons of the war and through which it unfolded, as can be seen from some spectacular views of the time, the history of the fortification from the fourteenth to the eighteenth century. And yet, only eight years later, General William Greeme highlighted gaps and weaknesses. In Corfu, the definitive crisis of the art of the Renaissance war was prefigured, which, having to deal with the continuous technological innovations of weapons and explosives, could not resort to codified languages or rely on definitive certainties.