I went church mass Sunday. I'm sure they open 7 days. Google St Louis, can tell you time open.
Just check out their website: www.stlouiscathedral.org and you can get in touch or see the calendar of events (they have mass, confessions, coffee social, sometimes concerts).
They have a schedule, you should inform yourself prior to visi8
It is a functional church, there are no closed days. It's so beautiful.
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