The Secreta fidelium Crucis of Marino Sanudo, a history of the Crusades written by a Venetian noble between 1306 and 1321, is also of value, particularly for the Crusade of Frederick II.
It illustrates Marino Sanuto's Secreta fidelium crucis, in which its author vainly appeals to Christendom to undertake another crusade.
2L - Map illustrating Marino Sanuto's Liber secretorum fidelium crucis.
Among more eminent Genoese cartographers are Joannes da Carignano 1344), Petrus Vesconte, who worked in 1311 and 1327, and is the draughtsman of the maps illustrating Marino Sanuto's Liber secretorum fidelium crucis, which was to have roused Christendom to engage in another crusade (figs.
nobis sua sanctissima passione ligno crucis justificationem meruit et pro nobis deo patri satisfecit," " Christ earned our justification by His most holy passion and satisfied God the Father for us."