Treaty Site History Center

Treaty Site History Center Home to the Nicollet County Historical Society. The Treaty Site History Center is the headquarters of the Nicollet County Historical Society.

A county museum and more, the site’s exhibits explore the fascinating history of Nicollet County and Minnesota’s territorial expansion. During your visit to the Treaty Site History Center you will explore the stories of Nicollet County’s first inhabitants- the Dakota people, explorers, traders, and settlers. The interaction between these people laid the historical groundwork for the signing of the

1851 Treaty of Traverse des Sioux, signed here in July of 1851, that ceded 24 million acres of Dakota land to the U.S. government and opened the land to new settlers and westward expansion. Once settlers began pouring into Nicollet County, fur trading was replaced by farming and soon little villages became bustling towns with booming businesses. The Treaty Site also takes a look at local agriculture, business, geology, and much more in its rotating exhibits featuring Nicollet County history.

“Father, you think it a great deal you are giving for this country. I don’t think so, for both our lands and all we get ...
07/24/2026

“Father, you think it a great deal you are giving for this country. I don’t think so, for both our lands and all we get from them will at last belong to the white man. The money comes to us, but will all go to the white men who trade with us.”
- Opiyahedaya (Curly Head), July 23, 1851*

Today marks 175 years since the Treaty of Traverse des Sioux was signed by representatives of the U.S. government and the Sisíthuŋwaŋ and Waȟpéthuŋwaŋ Daḳóta following several weeks of negotiations at Traverse des Sioux (present-day Saint Peter).

Together with the Treaty of Mendota, the Treaty of Traverse des Sioux added millions of acres of Daḳóta land to the United States, significantly impacting Daḳóta communities and the future of Minnesota. The area encompassed by the Treaty of Traverse des Sioux extended from Winona to Moorhead to Luverne, covering nearly 40 percent of present-day Minnesota.

The Treaty of Traverse des Sioux remains one of the most consequential events in Minnesota history. Its effects continue to shape our state, our communities, and our understanding of the past.

We invite you to learn more by visiting the Treaty Site History Center in Saint Peter, where the stories of the treaty, the people involved, and its enduring legacy continue to be explored.

The History Center and Cox House are closed today. Happy Independence Day!
07/04/2026

The History Center and Cox House are closed today. Happy Independence Day!

Reminder:  We're closing at 1:00 pm all week. We're closed for July 4.
07/01/2026

Reminder: We're closing at 1:00 pm all week. We're closed for July 4.

We are closed today. Regular hours resume on Saturday from 10:00 am-4:00 pm.
06/19/2026

We are closed today. Regular hours resume on Saturday from 10:00 am-4:00 pm.

We are closing at 1:00 PM today due to a staffing shortage and an issue with our air conditioning. 🥵 We are very sorry f...
06/10/2026

We are closing at 1:00 PM today due to a staffing shortage and an issue with our air conditioning. 🥵 We are very sorry for any inconvenience.

Address

1851 N Minnesota Avenue
Saint Peter, MN
56082

Opening Hours

Tuesday 10am - 4pm
Wednesday 10am - 4pm
Thursday 10am - 4pm
Friday 10am - 4pm
Saturday 10am - 4pm

Telephone

(507) 934-2160

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