The Osage Nation Historic Preservation Office (ONHPO) is dedicated to preserving the rich culture and history of the Osage Nation and sharing that knowledge with the Osage people. They work closely with federal, state, and local agencies to ensure tribal consultation and collaborate in identifying, protecting, and preserving archaeological and historic Osage sites within the Osage Nation Reservation and ancestral lands.
With a focus on addressing the cultural preservation needs of the Osage people, the ONHPO aims to safeguard their heritage as outlined in the 25-year Strategic Plan. Their ancestral lands span across several states, including Illinois, Missouri, Arkansas, Kansas, Oklahoma, and parts of Texas, Louisiana, Colorado, Iowa, and Wisconsin, with earlier ancestral lands encompassing states along the Ohio River Valley.
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