The Washington County Courthouse anchors Jonesborough's historic Main Street with its Greek Revival architecture dating to 1913, standing on ground where courthouse structures have served since the county's founding in 1777. The surrounding courthouse square has witnessed pivotal moments in Tennessee and Appalachian history, including debates over the short-lived State of Franklin. The building remains an active center of county government and a required stop on any historic district walking tour. Plaques and monuments on the courthouse grounds trace the county's remarkable story.