Nicollet County Historical Society/ Treaty Site History Center

Contact Information


  • $5.00 per Adult, $3.00 for 6-17 years old, 5 years old and under and NCHS members free. $7.00 combination pass to E. St. Julien Cox House and Treaty Site History Center. Free parking.


More Information


  • Located at intersection of Federal Hwy 169 & State RD 22 on the North end of St. Peter.

Other Date Information

  • Monday-Saturday 10:00am-4:00pm; Sunday 1:00 pm-4:00 pm.

Attraction Attributes

  • Accessible to Disabled
  • Can Accommodate Groups of 45 or more
  • Native American Heritage
  • Scandinavian Heritage

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  1. Author William Lass

    1851 North Minnesota Ave
    St Peter, MN 56082
    Call: 507-934-2160

    William Lass
    Treaty Site History Center

    Author William Lass will be here to talk about his new book “Shaping the North Star State: A History of Minnesota’s Boundaries.” William Lass is a historian, author of many books, Professor Emeritus at Minnesota State University-Mankato and a recipient of many awards. Most recently, he was the first recipient of The Lifetime Service Award at the Northern Plains History Conference in 2012.

    Join us for this program and learn about Minnesota’s bizarre Northwest Angle, the attempt to make Minnesota a long, narrow state, and many other interesting aspects about the shape of our state.

    The Treaty Site History Center is located one mile north of downtown Saint Peter at Highways 169 and 22, across from the Mankato Clinic. The Center features a national award-winning exhibit on the Traverse des Sioux Treaty of 1851 and its consequences, as well as local history, and a full-service research archive.

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