From the second half of the Middle Ages, only the height of the cathedrals counts. The architects will then compete in ingenuity and talents in order to raise theirs as high as possible. The invention of flying buttresses will be predominant because they will support the ever higher walls of churches. They will add serrated pinnacles adorned with mineral flowers. They will aim to weigh on the flying buttresses and give a better elevation. The windows will be able to extend and let the light in.