Official website: Sacre Coeur Basilica
The Basilica of the Sacred Heart of Paris, commonly known as Sacré-Cœur Basilica and often simply Sacré-Cœur is a Roman Catholic church and minor basilica, dedicated to the Sacred Heart of Jesus, in Paris, France. A popular landmark, the basilica is located at the summit of the butte Montmartre, the highest point in the city. Sacré-Cœur is a double monument, political and cultural, both a national penance for the defeat of France in the 1870 Franco-Prussian War and the socialist Paris Commune of 1871 crowning its most rebellious neighborhood, and an embodiment of conservative moral order, publicly dedicated to the Sacred Heart of Jesus, which was an increasingly popular vision of a loving and sympathetic Christ.
Source: edited from Wikipedia