The annual commemoration of the signing of the Buffalo Creek Treaty of 1842, which restored the Seneca Nation territories of Cattaraugus and Allegany, is scheduled for 11 a.m. Friday at the Burchfield Nature and Art Center, 2001 Union Road, West Seneca.

A fraudulently manipulated treaty in 1838 had attempted to turn the territories over to the Ogden Land Company. The commemoration memorializes the agreement between the Seneca and the United States government and is cited by the Senecas as evidence that New York State cannot tax Indian Reservation activities.

From 10 a.m. to 6 p.m. Friday, Native Roots Artists Guild will feature art vendors on the grounds of the center, offering Native American-made items for sale. Meanwhile, an exhibit of art portraying Native American culture continues through June 2.