The city of Tucson recently announced plans to return ancestral land back to the Tohono O’odham Nation.

Last month, the Tucson City Council unanimously approved a proposal to give more than 10 acres (40,000 square meters) of city land at the base of Sentinel Peak to the tribe. The move comes after decades of conversations the City of Tucson has had on what to do with the land.

The area known as “the birthplace of Tucson,” where the Hohokam, the ancestors of the Tohono O’odham, grew crops and thrived for more than 4,500 years.

The transfer recognizes “the sovereignty of the Tohono O’odham Nation,” according to the council’s motion.

The tribe’s chairman, Ned Norris Jr., said there are significant archaeological and historical remnants of ancestors on that land.

There have been discussions of Tucson Mayor Regina Romero putting the land in a trust with Democratic U.S. Rep. Raúl Grijalva.