Cleveland is the county seat of Cuyahoga County, the most populous county in the U.S. state of Ohio. It was founded in 1796 near the mouth of the Cuyahoga River, and became a manufacturing center owing to its location at the head of numerous canals and railroad lines. With the decline of heavy manufacturing, Cleveland's businesses have diversified into the service economy, including the financial services, insurance, and healthcare sectors. As of the 2000 Census, the city proper had a total population of 478,403, making it the 33rd largest city in the nation. Recent investments have provided the city with tourist attractions in the downtown area, such as Jacobs Field, the Rock and Roll Hall of Fame, and Playhouse Square Center. In studies conducted by The Economist in 2005, Cleveland and Pittsburgh were ranked as the most livable cities in the United States, and the city was ranked as the best city for business meetings in the continental U.S. Nevertheless, the city faces continuing challenges, in particular from concentrated poverty in some neighborhoods and difficulties in the funding and delivering of high-quality public education.