Place of worship

St Mary's Institute

204 N Main St, O'Fallon, MO, 63366

St Mary's Institute is a place of worship in O'Fallon, St. Charles County, Missouri — listed by Foursquare OS Places, Overture Maps Places; last seen September 2026.

Who meets here

Also listed at this address: Sisters of the Most Precious Blood.

How we know

2 independent sources agree on this place. About our sources