They were still called architects. Freemason is a secret society.
D due to people giving up some of their rights in exchange for protection from the government.
Before the revolution there were three estates(societies) the First (clergy); the Second nobility); and the Third (commoners). Of course like it is now, the poor commoners paid the most taxes. Upper clergy and nobility paid nothing or close to it. The king was not considered part of any estate. Of course the commoners eventually rebelled