Even the discord of war is a detail on which the Abbey refuses to insist. Not till two centuries afterwards did the Mount take on the modern expression of war as a discord in God's providence. Then, in the early years of the fifteenth century, Abbot Pierre le Roy plastered the gate of the Châtelet as you now see it, over the sunny thirteenth-century entrance called Belle Chaise which had treated mere military construction with a sort of quiet contempt. You will know what a Châtelet is when you meet another; it frowns in a spirit quite alien to the twelfth century; it jars on the religion of the place; it forebodes wars of religion; dissolution of society; loss of unity; the end of a world. Nothing is sadder than the catastrophe of gothic art, religion and hope.