Delaware's capital is the city of Dover. The city is abbreviated as 'DEE' in three letters. Dover is located in Kent County, Delaware and is the second most populous city in the state. It is also the county seat of Kent County. Dover is known for its historical sites, such as the Dover Green Historic District, the John Dickinson Plantation, and the Legislative Hall. Dover is also home to Dover Air Force Base, which is the largest military base in the state.