Willamette Stone

The Willamette Stone was a small stone obelisk originally located in the western hills of Portland, Oregon in the United States. It marked the intersection and origin of the Willamette meridian and Willamette baseline, which defined the grid system of sections and townships from which all real property in the states of Oregon and Washington has been measured following the Donation Land Claim Act of 1850. The Willamette meridian runs north-south from the marker, and the Willamette baseline runs east to west through the marker.