This incredible church dates back to the 1820's when it was built, and its parishoners date back to the mid-1600's and the founding of the city.
The interior is awesome. There are wood handcarvings, stained glass, paintings, and sculptures that depict the story of the Bible, and an incredible blue ceiling with gold stars. In the rear of the church, they have a huge and beautiful organ (built in 1891) with over 7,000 pipes (I wish I could have heard it).
The acoustics inside are amazing. You can hear soft conversations throughout the place, which makes sense, since they didn't have microphones and loadspeakers when it was built.
Masses are held at 7:30am, 12:15pm, and 5pm on Monday through Friday, at 5pm on Saturday, and on Sunday at 8am, 9:30am, 11am, 12:30pm, and 5pm. Guided (in French and English) and self-guided tours are available when services are not being held, and included in the $2 CDN admission.
There is a Gift Shop adjacent to the church. I thought it was kind of tacky for it to be open on the Sunday of our visit.