Designated a National Historic Landmark, the New Haven Green is one of the nine “squares” in the city’s 1638 village plan. Its three churches are outstanding examples of Gothic, Federalist, and Georgian design. On Church Street facing the New Haven Green is City Hall, one of the country’s earliest and finest designs in the High Victorian style. It is a work of Henry Austin, containing an elaborate iron staircase. The polychrome façade in various sandstone and limestone shades was restored in 1976. The historic façade was incorporated into the updated City Hall in 1993–1994.