19th century. Paris, the Eiffel Tower and the Sacre-Coeur church are practically completed at the same time. The metal of the tower represents development, overall accomplishments, and success. The Sacre-Coeur church’s domes, semicircular arches, and rose windows represent a return to the Middle Ages. These two structures exemplify the French coordinate system throughout the entire nineteenth century: a yearning for advancement while yet feeling a strong apprehension about moving forward, losing stability, and breaking away from the roots. This conversation between the past and the future, revolution and restoration, is fascinating.