This work celebrates the deeds of the Knights of Saint Stephen in defending Tuscany against the Turks. The fine plates show various naval battles and sieges but included in this copy is the frontispiece portrait of Cosimo III, Grand Duke of Tuscany, which is sometimes lacking. The Order of Saint Stephen was founded in Pisa, later moving to Ligorno. Christendom was constantly threatened in the Mediterranean by the Turks until a Holy League was formed by the Papacy, Spain and Venice to confront Turkish aggression. Volunteers came from all over Europe, and the Turks were defeated at the famous naval Battle of Lepanto in 1571. The Knights of Saint Stephen were founded by Cosimo I, Grand-Duke of Tuscany, in 1562, in imitation of the Knights of Saint John of Malta, to defend the Tuscan coasts from attacks by Barbary pirates. Many of these naval battles took place in the Greek archipelago. Their greatest successes occurred at the beginning of the seventeenth century.