FILE - In this photo Friday, Oct. 10, 2008 file photo, Democratic presidential candidate Sen. Barack Obama, D-Ill., speaking during a rally at the Ross County Courthouse in Chillicothe, Ohio. This weekend, county officials from around the state are gathering in Columbus for the Ohio Courthouse Symposium to share ideas with historic preservationists, judges, architects and others for preserving the state’s many historically significant county-seat edifices. The courthouse dates to the 1850's. (AP Photo/David Kohl)