Karl Mollweide was a German mathematician and astronomer, born on April 15, 1774, in the city of Königsberg. He is best known for developing the Mollweide projection, a method for representing the Earth's surface on a flat map. This projection is particularly useful for displaying global data, as it preserves area relationships, making it easier to compare different regions. Mollweide's work extended beyond cartography; he also contributed to the fields of algebra and geometry. He passed away on March 10, 1825, leaving a lasting impact on mathematics and geography through his innovative approaches and techniques.