Toledo, seat of Lucas County, northwestern Ohio, a port on the Maumee River, at its mouth on Lake Erie; incorporated 1837. The city's extensive transportation facilities include its fine natural harbor, which is a port on the Great Lakes-Saint Lawrence Seaway and ranks among the world's leading soft-coal-shipping ports; an extensive network of railroads; and an air cargo terminal. Other commodities handled include grain, automobile parts, iron ore, and steel. Toledo is also a commercial and industrial center, with manufactures that include metal goods, jeeps, instruments, machinery, automobile parts, chemicals, textiles, and plastics. Its large glass-manufacturing industry dates from 1888. The city is a terminus of petroleum and gas pipelines and is a major oil-refining hub. The city has a museum of art and a museum of health and natural history.