Fascinating exhibits and resources for research and reference in a little museum on the rise.. In Short First-class rotating exhibits complement an ever-expanding archive of records, photos and artifacts at this Whittier neighborhood mansion. A collection that has always been a treasure trove for scholars is becoming an increasingly popular attraction for the general public. Founded in 1858 as the Hennepin County Territorial Pioneers Association, this museum has grown and changed along with Minnesota. Two floors of permanent and special exhibits explore the area's indigenous population, its rich immigrant heritage, and the growth of Minneapolis as a city and cultural center.