The Secret of the Cathedral

Since ancient times there have been brotherhoods of builders, who were the only ones who knew the art of construction. In Rome they were called "Caementarius", in France "Macons", in England "Freemasons" and in Germany "Freimaurer". These lodges transmitted their knowledge, like inviolable secrets, between the brothers. But, in addition, they were highly educated men, who contributed to the development of culture at a time when it was on the ground.
They were the only ones qualified to build...