About that church:
From Wikipedia
Sacré-Cœur Basilica is located at the summit of the butte of Montmartre. From its dome two hundred meters above the Seine, the basilica overlooks the entire city of Paris and its suburbs. ….
….The basilica was first proposed by Felix Fournier, the Bishop of Nantes, in 1870 after the defeat of France and the capture of Napoleon III at the Battle of Sedan in the Franco-Prussian War. He attributed the defeat of France to the moral decline of the country since the French Revolution, and proposed a new Parisian church dedicated to the Sacred Heart of Jesus....
MarQ
Red, In addition to the information you posted from Wikipedia here is some more information on the basilica:
“The Basilica of the Sacré-Cœur of Montmartre is the Shrine of Perpetual Adoration and divine Mercy, dedicated to Jesus’ Sacred Heart. It is a unique place where people pray day and night, continuously, for almost 140 years now.”
VR/pat