Nicollet County Historical Society / Treaty Site History Center

Contact Information

Nicollet County Historical Society / Treaty Site History Center

1851 N Minnesota Ave
St Peter, MN 56082

(507) 934-2160 (Phone)

(507) 934-0172 (Fax)

Region: Southern

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  • $6.00 for Adults, $5.00 for Seniors ages 65+, $4.00 for children ages 5-17, FREE for children 4 years old and under and Nicollet County Historical Society members.


More Information


  • The Treaty Site History Center is located at 1851 N. Minnesota Avenue, one mile north of downtown Saint Peter at Highways 169 and 22, across from the Mankato Clinic. Lot parking.

Other Date Information

  • Exhibits: Tue. - Sat. from 10am - 4pm Business hours: Tue. - Fri. from 10am – 4pm. Research Library: Tue. – Fri. from 10am – 4pm. Closed Sundays and Mondays.

Green Practices

  • Eco-Friendly Landscape/Facility Design

Attraction Attributes

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

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  1. A Letter Writing Social

    A Letter Writing Social

    1851 N Minnesota Ave
    St Peter, MN 56082
    Call: (507) 934-2160

    In this time of instantaneous communication, handwritten correspondence is a rare and wondrous item. Keep the art of letter writing alive. Prepare your pen and paper and join in and write a good old fashioned letter or card.

    At this come-and-go, family-friendly event reconnect with an old friend, write a thank you, or scribble a note to a loved one. We encourage you to bring samples of family letters especially if they might be of historical interest, fountain or dip pens, other writing utensils, letterhead, stamps, your address book, etc. Refreshments provided.

    Walk-ins are welcome but we encourage you to sign-up so we can prepare the materials. Follow this link to register:

    Some paper and envelopes will be provided, but you're encouraged to bring some from your own stash. (C'mon, we know about your secret stationary stash.) Typewriters also welcome! Postage not provided.

  2. Film Series | Seth Eastman: Painting the Dakota

    Film Series | Seth Eastman: Painting the Dakota

    1851 N Minnesota Ave
    St Peter, MN 56082
    Call: (507) 934-2160

    This is a story of art crossing the boundaries of culture and time. Learn about artist and military officer Seth Eastman's life and the traditions of the Dakota he depicted, through Eastman's artwork, essays, and interviews with Dakota elders. Eastman was a soldier who spent many years in the American west, particularly working as an artist to document Native Americas for the U.S. government and for private purposes. In the 1840s, he was the commander at Fort Snelling and was accompanied by his wife, Mary Henderson Eastman. Eastman and Mary were very sympathetic to the Indians and they took great pains to learn their language and customs, making his images some of the most accurate and interesting of the nineteenth century.

    Not Rated, Runtime 60 min.

  3. Film Series | The Great Math Mystery

    Film Series | The Great Math Mystery

    1851 N Minnesota Ave
    St Peter, MN 56082
    Call: (507) 934-2160

    NOVA leads viewers on a mathematical mystery tour -- a provocative exploration of math's astonishing power across the centuries. We discover math's signature in the swirl of a nautilus shell, the whirlpool of a galaxy and the spiral in the center of a sunflower. Math was essential to everything from the first wireless radio transmissions to the prediction and discovery of the Higgs boson and the successful landing of rovers on Mars. But where does math get its power? Astrophysicist and writer Mario Livio, along with a colorful cast of mathematicians, physicists, and engineers, follows math from Pythagoras to Einstein and beyond, all leading to the ultimate riddle: Is math an invention or a discovery? Humankind's clever trick or the language of the universe?

    Rated PG, Runtime 54 min.

  4. North Mankato History Revealed

    North Mankato History Revealed

    1851 N Minnesota Ave
    St Peter, MN 56082
    Call: (507) 934-2160

    North Mankato has no location to feature its history. The result is that most residents know very little about the history that surrounds them. (for example, we have two buildings on the National Register of Historic Places!) This presentation will include a lively description of 45 images of the North Mankato that we pass by every day, but that hardly anyone sees.

    ABOUT THE PRESENTER: Tom Hagen taught history and English in Southern Minnesota public schools for thirty years. After retirement, he began to teach at Minnesota State University in the humanities department specializing in Asian Studies, and has worked as an adjunct faculty member there for the last 14 years. Tom has also been active in preservation work, restoring and rebuilding four properties, and he received a Stewardship Award from the Preservation Alliance of Minnesota for his work.

    Cost is FREE for NCHS members and $3 for non-members

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