Superb reduced version of Mercator's famous 1569 World map. Engraved by Porro The title mentions Romuldus Mercator .
Gerard Mercator's world map was condensed into double-hemisphere form by his son Rumold, preserving the bulge to the coast of South America. The hemispheres are surrounded by an elaborate strapwork border; between them lie an armillary sphere and compass-rose.
Girolamo Porro was able to preserve an incredible amount of the original detail in his reduction, including text on the Southern Continent
The map includes a classical late 16th Century configuration of the World, including a Northwest Passage, unusual depiction of the North Pole, massive Terrae Australis, narrow passage between South America and Terrae Australis, bulging western portion of South America and unusual treatment of North America, to name but a few of its features. Some of the placenames mentioned by Marco Polo in Asia are present, as are several of the mythical islands of the Atlantic.