Who was Gaspard Monge?

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Figure 1: Two techniques of representing an object. (A) Perspective drawing, suggesting that the object is cubical. (B) Orthographic top and front views, revealing that the object is not cubical. — drafting Figure 1: *Two techniques of representing an object.* (A) Perspective drawing, suggesting that the object is cubical. (B) Orthographic top and front views, revealing that the object is not cubical.

Gaspard Monge (1746–1818) was a French mathematician who revolutionized engineering and architectural design by inventing descriptive geometry. This discipline provides the mathematical principles for representing three-dimensional objects on a two-dimensional plane, a foundational concept in modern drafting and graphics.1

While working as a draftsman at the military school of Mézières, Monge developed geometric methods to solve complex construction and fortification problems—such as determining gun emplacements—that previously required lengthy arithmetic calculations. He later formalized these techniques in his influential work, Géométrie descriptive (1799), which introduced the use of projections, including plans, elevations, and traces, to represent solids on paper.1

Beyond his contributions to drafting, Monge was a key figure during the French Revolution, helping to establish the metric system and the École Polytechnique. He was also a prominent educator whose lectures and textbooks significantly advanced mathematics education, influencing generations of mathematicians.1