From the record
“It was built by Ambrose Oschwald, the Roman Catholic priest who founded St. The site was added to the National Register of Historic Places in 2001.”
Wikipedia article St. Mary's Convent, CC BY-SA 4.0.
One of 38 National Register listings published here for Manitowoc County · listed in 2001 · category: Building · built in 1865, Greek Revival architecture.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service · the Wikipedia article

