1854
The first Catholic church at Beloit was built by Father Norris
BeloitGrade A · 1 independent source
The evidence
“The first Catholic church at Beloit was built by Father Norris in 1854. This stone building was destroyed by fire December 23, 1884.”
1908-brown-rock-county/13-beloit-churches.md, Vol. 1, PDF p. 299 / book p. 273
Brown, William Fiske, editor. Rock County, Wisconsin: A New History of Its Cities, Villages, Towns, Citizens and Varied Interests, from the Earliest Times, Up to Date. Chicago: C. F. Cooper & Co., 1908. 2 vols. archive.org/details/rockcountywiscon01brow, archive.org/details/rockcountywiscon02brow.
Grade A: Found on a page of one of our sources