How to build a pointed arch and the trouble with the physics after you finish. When these methods of building were first created in northern France, there was no arabic numerals in Europe. The common numbers used were roman numerals, a very inneficient system for calculation purposes. Arabic numerals were introduced by Fibonacci in the earlies 1200s. Basilica of St. Denis, which is often refered to as the first gothic church, was being built in the mid-1100s. So how did the builders prepared to do their work?
The geometry was the solution. Geometric drawings were needed to plan the construction of big buildings, such as gothic cathedrals.