Euclid is often referred to as the "Father of Geometry" due to his influential work in the field, especially through his book "Elements." Written around 300 BCE, "Elements" systematically compiled and organized the knowledge of geometry of that time, presenting definitions, postulates, and theorems. His logical approach laid the groundwork for modern mathematics, particularly in the field of geometry. The deductive structure he used in his propositions set a standard that persists in mathematical education today. His concepts, such as points, lines, and circles, remain fundamental to the study of geometry and shapes.