Platteville Limestone, Church of the Assumption, St. Paul, 2016. Photograph by Paul Nelson.

Platteville Limestone curve of the Church of the Assumption, St. Paul, 2016. Photograph by Paul Nelson.

Cathedral of Our Merciful Savior, Faribault, 2016. Photograph by Paul Nelson.

Fort Snelling Chapel, 2016. Photograph by Paul Nelson.

First school at St. Mary's Mission, Red Lake, Minnesota, c.1880s.

Corn god holding an ear of corn. Photograph by Wikimedia Commons user ŠJů, 2012.

Reverend Stephen Riggs and his wife, Mary Riggs, ca. 1860.

The Hazelwood Mission of Stephen R. Riggs in Yellow Medicine County, c.1860.

The restored Dakota mission of Stephen R. Riggs and Thomas S. Williamson at Lac qui Parle State Park, 1971. Photographed by Jack Renshaw.

Stephen R. Riggs, 1862. Photographed by Whitney’s Gallery.