Guillaume Le Testu

Guillaume Le Testu is best known for creating the Cosmographie Universelle, a manuscript atlas completed in 1556. This work is historically notable for its detailed portolan charts and early, speculative depictions of a southern continent.

While he did not map the actual Australian continent, Le Testu included early depictions of Terra Australis in his 1556 atlas. This was a highly speculative southern continent that European geographers believed existed to balance the northern landmasses.

Yes, as a French privateer and explorer, Le Testu was active during the era of the French Wars of Religion. He operated alongside figures like Admiral Gaspard de Coligny, who famously sponsored the ill-fated French Protestant colony in Rio de Janeiro.

Guillaume Le Testu died in 1572 during a fierce naval battle off the coast of the Cape Verde Islands. He was killed while serving as a privateer attacking Portuguese ships.