Washington, D.C. was established in 1791 by an act of the infant United States Congress. To avoid a dispute between the various states and regions about which city should be the capital of the new nation, Congress established a brand new city, outside any existing state. The District of Columbia was carved out of Virginia and Maryland, and the new city was built (the land ceded by Virginia was returned to that state in 1846 and now comprises Arlington County and much of the City of Alexandria). Designed by architect Pierre Charles L'Enfant according to Enlightenment-era rationalist philosophy, Washington (named after the country's first president) was envisioned as a kind of Socratic wildlife refuge for America's new philosopher-kings.