Suger, friend and confidant of the French Kings, Louis VI and Louis VII, decided in about 1137, to rebuild the great Church of Saint-Denis, attached to an abbey which was also a royal residence. He began with the West Front, reconstructing the original Carolingian façade with its single door. He designed the façade of Saint-Denis to be an echo of the Roman Arch of Constantine with its three-part division and three large portals to ease the problem of congestion. The rose window is the earliest-known example above the West portal in France. The façade combines both round arches and pointed arches of the Gothic style.
కాన్స్టంటైన్ రోమన్ ఆర్క్ నిర్మాణంలో మూడు పెద్ద ద్వారాలు ఎందుకు ఉపయోగించబడ్డాయి?
to ease the problem of congestion