Ian, you sent me surrying to the web to find just where one would find Sainte Madeleine en la Cité in Paris. Turns out it was pulled down in the Revoultion. Used to be in Rue de la Juiverie, now Rue de la Cité. A former synagogue converted in the XII century into a church, also "the seat of the oldest of Parisian confraternities --la grande confrérie de Notre Dame [...] which had the archbishop for its abbot and the president of Parliament for its dean" (pp 281-282 in Walks in Paris by Augustus John Cuthbert Hare). Here is the link: Walks in Paris