 They were the first accounts to detail the Sunda Islands and Spice Islands since the accounts of Marco Polo, and there is reason to believe that some of the new information on Fra Mauro's map was gleaned from conversation with Niccolò.His accounts probably encouraged the European travels of exploration of the end of the century.de' Conti also influenced 15th century cartography, as can be seen on the Genoese map (1447–1457), and in the work of the mapmaker Fra Mauro, whose influential Fra Mauro map (1450) offered one of the clearest depiction of the Old World.