The basilica of sacre coeur is located in an area of paris that has been considerd sacred for thousends of years?

The Basilica du Sacré Coeur also challenges the laws of physics due to its colossal foundations. To build the Basilica, it was necessary to construct very deep bases, 83 wells 38 meters underground to ensure the building was solid! What makes some people say that this basilica supports the hill, filled with limestone and gypsum, known for being weak.

the answer is sylvie.