Midewiwin
Midewiwin, or Grand Medicine Society, is a spiritual society found historically among the Algonquian of the Upper Great Lakes (Anishinaabe), northern prairies and eastern subarctic. Once widespread, the Midewiwin became less prevalent after the arrival of Europeans in the 18th and 19th centuries. Today, the largest Midewiwin societies are found in parts of Ontario, Manitoba, Wisconsin and Minnesota.