The Sacre-Caur's architect, Paul Abadie, wanted to demolish St-Pierre, but he was overruled, and it was restored as a riposte to the Sacre-Caur. 
The architect of Sacre-Caur was Paul Abadie. 
mnli hypothesis: The architect of Sacre-Caur was Paul Abadie.  premise: The Sacre-Caur's architect, Paul Abadie, wanted to demolish St-Pierre, but he was overruled, and it was restored as a riposte to the Sacre-Caur. 