The New Haven Green Historic District is a central public park located in New Haven, Connecticut. Established in the 17th century, it serves as a historic gathering place and is surrounded by important buildings, including churches and government structures. The Green is a designated National Historic Landmark, reflecting its significance in American history. The district features three historic churches: Center Church, Trinity Church, and United Church on the Green. The area is also known for its beautiful landscaping and hosts various community events throughout the year, making it a vibrant part of the city's cultural life.