"'Portolan charts,' so called from the Italian adjective portolano, meaning 'related to ports or harbours,' were born during the 12th century in the maritime community. These charts, drawn on parchment and crisscrossed with lines referring to the compass directions, indicated the succession of ports and anchorages along the shores, and were used by European sailors exploring the world up until the 18th century. Not only used as navigational instruments...