New Haven, Connecticut

New Haven in the U.S. state of Connecticut, is the principal municipality in Greater New Haven. It is the second-largest city in Connecticut. It was founded in 1638 by English Puritans, and a year later eight streets were laid out in a four-by-four grid, creating what is now commonly known as the "Nine Square Plan", now recognized by the American Institute of Certified Planners as a National Planning Landmark. The central common block is New Haven Green, a 16-acre (6 ha) square, now a National Historic Landmark and the center of Downtown New Haven.