Ohio is the birthplace of eight U.S. presidents, including William Henry Harrison, Ulysses Grant, Rutherford Hayes, James Garfield, Benjamin Harrison, William McKinley, William Howard Taft and Warren Harding. This is the reason why Ohio is also called the "mother of presidents." Ohio's name originated from the Iroquois Indian word meaning "great river."
The Ohio flag is the only nonrectangular-shaped flag in the United States. The flag has a swallowtail design and uses the primary colors and the stars of the national flag. The large triangle represents the valleys and hills of Ohio, while the stripes represent the roads and waterways of the state. The white circle with a solid red letter "O" inside the large blue triangle represents the state's nickname as the "Buckeye State."
Native American cultures that flourished in Ohio from 1000 to 1750 built more than 6,000 ceremonial grounds all over the valley. Some of the most notable burial mounds are the Great Serpent Mound in Adams, the large burial mound in Athens and the mounds near the Miami River drainage. The mounds are rich in prehistoric remains and are protected by the Ohio Historical Society. Some mounds, however, were excavated to create roads or for research purposes.