Visconte Maggiolo (1478 – after 1549), also spelled Maiollo and Maiolo, was a Genoese cartographer.
He was born in Genoa and maybe he was a fellow sailor of explorer Giovanni da Verrazzano.
[2] Some historians say that he died of malaria in 1530; but archival documents show that he was still alive, in Genoa, at least in 1549, although he certainly was already dead in 1561.
This map had a major error (the eponymous "Verrazzano Sea" and "Verrazzano Isthmus", which depicted a large sea, believed to be the Pacific Ocean, across a narrow isthmus on the eastern coast of North America) as Verrazzano did not accurately describe the North American continent.
[5] There are numerous portolan charts, atlases and at least two other world maps made by Vesconte Maggiolo: one dated Genoa, 1531;[6] another kept at a public library in Treviso (in Italian), is dated Genoa, 1549.