Which artist invented the collage art form, and in what year? what are artists doing, or what principle are they following when they created a collage?

Georges Braque and Pablo Picasso both coined collage in the beginning of the 19th century, where the artwork is made from and assemblage of different forms this creating a new whole, it became a distinctive part of modern art

Religion changed from primitive times through the renaissance period until today such that certain church conventions and rules were set about how the holy family could be portrayed. for instance: mary must always be in a blue mantle, jesus could only be in a white robe after the resurrection, jesus could no longer be seen pointing with his walking stick when performing a miracle, and so on.hope this