At first glance, this map of the Polish–Lithuanian Commonwealth appears to be of Dutch production. In the 17th century, the Netherlands were the centre of European cartography. Several competing workshops, however, were wont to republish their maps repeatedly, as often as possible. This may have served business interests but it was detrimental to the maps’ quality. In contrast, French cartography proved to be much more innovative. Thus, it is not by accident that Justus Danckerts (1635-1701), scion of an Amsterdam dynasty of cartographers, did not produce his own map but rather relied on the model of one by French royal geographer Guillaume Sanson (1633-1703).