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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, which 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. At the history center, visitors also learn about local agriculture, business, geology, and much more in its rotating exhibits featuring Nicollet County history.


Sunday & Monday: Closed
Tuesday–Saturday: 10:00 AM–4:00 PM


$6.00 for Adults
$5.00 for Seniors 65 years +
$4.00 for children ages 5-17
Free for children ages 4 years old and younger, and members of the Nicollet County Historical Society.


Learners of all ages will explore the striking exhibits found within the Treaty Site History Center as well as the landmarks along the Traverse des Sioux Historic Site.

Educators can more about field trips here.
Group tour organizers can book a tour here.



  • Headquarters for the Nicollet County Historical Society
  • Full-service research library
  • Gift shop
  • Traveling and changing exhibits
  • 2009 AASLH Award of Merit recipient for our 1851 Treaty of Traverse des Sioux exhibit
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