Gerardus Mercator

Educated at the University of Leuven under Gemma Frisius, Mercator established an acclaimed workshop in Leuven producing terrestrial globes, astrolabes, and maps. In 1544, he was arrested by Inquisition authorities on suspicion of Lutheran heresy, enduring seven months of imprisonment in Rupelmonde Castle before exoneration.

Fleeing to Duisburg in 1552, he created his revolutionary 1569 world map with lines of constant compass bearing (rhumb lines) as straight segments, an indispensable tool for ocean voyagers. His multi-volume cartographic collection introduced the term 'Atlas' with Titan bearing the globe.