Rumold Mercator
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Gerardus Mercator
thumb|right|200px|Gerardus MercatorGerardus Mercator was a cartographer, born in Rupelmonde in the Hapsburg County of Flanders, part of the Holy Roman Empire. He is remembered for the Mercator projection world map, which is named after him...
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He completed some at the time unfinished
Unfinished work
An unfinished work is creative work that has not been finished. Its creator may have chosen never to finish it or may have been prevented from doing so by circumstances outside of their control such as death. Such pieces are often the subject of speculation as to what the finished piece would have...
projects left after his father's death and added new materials of his own researches.