Pierre "Peter" Charles L'Enfant (French: [pjɛʁ ʃɑʁl lɑ̃fɑ̃]; August 2, 1754 – June 14, 1825) was a French-American artist, professor, and military engineer who in 1791 designed the baroque styled plan for Washington, D.C., the capital city of the United States. His work is known today as the L'Enfant Plan which inspired plans for other world capitals such as Brasilia, New Delhi, and Canberra. In the United States, plans for Detroit, Indianapolis and Sacramento took inspiration from the plan for Washington, DC .
Source : Wikipedia