Thus, the civilizations of the ancient world laid the foundations of graphic images and the visual representations of engineering objects. Visual information is represented in the images by the projections of objects, and the transmission of this kind of information was the discovery of the French mathematician Gaspard Monge (Pic.4).

G. Monge, born on May 10, 1746, in Beaune (near Dijon) in Burgundy, is the founder of descriptive geometry. Without Monge's geometry, which was initially intended for military purposes, the development of nineteenth-century industry would not have been possible. Illustrative geometry is the basis of drawings. 

One of his most important developments was a theory of building fortifications. Fortifications had to be designed so the enemy could not see or fire on a military position. This typically required complicated methods of calculation. Monge proposed a simpler solution to the problem. The work was given to a staff officer for evaluation. As the latter did not believe that this task could be solved in such a short time, he did not begin to check what had been presented: "Why should I bother with a complicated recalculation of the supposed solution? I believe in good computational skills, but not a miracle." Monge did not give up and explained that he did not use arithmetic to solve the problem. In the end, everything was found to be correct.

This event can be considered the beginning of descriptive geometry.

An engineering drawing not only helps convey ideas and convert concepts into reality, but it also follows criteria and conventions to eliminate confusion. The standardization of nomenclature and practices is a way to relay the information clearly to the individual who will read it and also make it easier to manufacture or construct the object.