Most of the proofs are made on his own. He is credited with the wonderful arrangement. More than a thousand copies of his work have been printed. They have been made since 1482. That was when mass printing was made available.
Euclidean geometry is the study of points, lines, planes and other geometric figures.
This is used with assumptions of Euclid. The most prolonged major argument has arisen over the parallel postulate. The parallel postulate is there can only be one line that contains a given point and is parallel to another line. The development of Euclidean Geometry extends at least for 12,000 years. The Elements geometry was based on ten logically correct ideas.