The Basilique Sainte Clotilde was built in the Neo-Gothic style and completed in 1857. It was reportedly the most fashionable church in 19th Century Paris and well-known for its Aristide Cavaillé-Coll organ.
For those who love classical music, it is interesting to note that César Franck inaugurated the organ playing his Final in B flat and J.S. Bach's Prelude and fugue in b minor. It is reported that every time Franz Liszt was in Paris, he would sit in the organ loft to hear Franck play his most recent compositions.
Basilique Sainte Clotilde
23 bis, rue Las Cases