The founder of geometry is often regarded as the ancient Greek mathematician Euclid. He lived around 300 BCE and is best known for his work "Elements," which systematically compiled and organized knowledge of geometry up to that time. Euclid's axiomatic approach laid the groundwork for modern geometry, introducing concepts like points, lines, and planes, as well as the idea of logical deduction from established definitions and postulates. His influence on mathematics is profound, with "Elements" serving as a textbook for centuries in both mathematics and philosophy, shaping mathematical education and exploration.