A visitor in the heart of downtown Montreal might get a feeling of déjà vu upon seeing the Cathedral-Basilica of Mary, Queen of the World (Cathedrale Basilique Marie-Reine-du-Monde). This reaction is typical for those familiar with Vatican City: The Montreal cathedral, consecrated in 1894, is a replica of St. Peter’s Basilica. A brochure compares the sizes: St. Peter’s is 700 feet long; Mary’s cathedral-basilica stretches 333 feet. St. Peter’s cupola has a 130-foot diameter; this cathedral’s is 75 feet.