The Diocese of Winona, MN was formed in 1889 and consists of Winona, Wabasha, Olmsted, Dodge, Steele, Waseca, Blue Earth, Watonwan, Cottonwood, Murray, Pipestone, Rock, Nobles, Jackon, Faribault, Martin, Freeborn, Mower, Fillmore, and Houston Counties in Minnesota. The map provided plots the locations of the two Polish Roman Catholic Churches in this diocese.