360 State Street

The Ninth Square Historic District encompasses a historically diverse and well-preserved part of the commercial area of Downtown New Haven, Connecticut. The district is bounded by Church, Court, State, and Crown Streets, and is centered on the intersection of Chapel and Orange Streets. The buildings in the district are mostly late-19th and early 20th commercial buildings, and includes a number of commercial buildings from the first half of the 19th century, a rarity in most of Connecticut's urban downtown areas. The district was listed on the National Register of Historic Places in 1984. Ninth Square takes its name from an early division of New Haven, when leaders of the New Haven Colony created a town plan of nine large squares in 1637, centered on the one now housing the New Haven Green. Because the ninth square was located closest to the colony's harbor, it was the first to develop a significant commercial presence. In the 1820s, the Farmington Canal was routed near the district, spurring further commercial development. The conversion of the canal right-of-way to railroad use intensified the area's commercial development in the second half of the 19th century. All of this resulted in a significant diversity of styles in the commercial buildings seen, generally reflecting architectural styles popular at the time of their construction. The area declined after World War II, but has been spared from destruction in urban renewal activities of the mid-20th century.The Ninth Square has been at the center of New Haven's cultural renaissance, densification and renewal over the last decade.

New Haven State Street station is a commuter rail station located on State Street in downtown New Haven, Connecticut. The secondary railroad station in the city, it is located 0.8 miles (1.3 km) northeast of the much larger New Haven Union Station and is intended to offer easier access to New Haven's downtown business district. It is served by Shore Line East and Hartford Line commuter trains, Amtrak Hartford Line trains, Springfield-terminating Northeast Regional trains, and Valley Flyer trains, and a limited number of Metro-North Railroad New Haven Line trains. Originally proposed in 1996, State Street opened on June 7, 2002. A second platform opened on June 8, 2018, in time for the beginning of Hartford Line service.

Artspace is a contemporary art gallery and non-profit organization located in downtown New Haven, Connecticut. Artspace presents gallery exhibitions, outdoor installations, a major annual Open Studios festival, and a teen education program. Artspace has been recognized for its artistic merit by the National Endowment for the Arts, the LEF Foundation, and the Tremaine and Warhol foundations. Artspace currently operates remotely. The physical location closed in June 2023.

The Kennedy Mitchell Hall of Records is located in New Haven, Connecticut and houses many of the City of New Haven's governmental functions, including finance, vital statistics, offices of the town clerk, and public hearing rooms where city policy is debated.

The Institute Library (Originally established as the New Haven Young Men's Institute, and sometimes called the Young Men's Institute Library) is a membership library in New Haven, Connecticut. Founded in 1826 in the tradition of Mechanics' Institutes, it is New Haven's oldest community library and one of the few membership libraries now remaining in North America. The organization was active during the 19th century as a center for lectures, debates, and classes in New Haven.

The John Cook House is a historic house at 35 Elm Street in New Haven, Connecticut. Built about 1807, it is one of the city's oldest surviving stone buildings, further notable for a parade of locally or statewide prominent residents. The house was listed on the National Register of Historic Places in 1983.

The Connecticut Financial Center is the tallest building in New Haven, Connecticut, and the sixth tallest building in the state. The 383 foot postmodern skyscraper was designed by the Toronto architectural firm Crang and Boake and completed in 1990. It is adjacent to New Haven City Hall facing the New Haven Green in Downtown New Haven. Among the current tenants of the building are United Illuminating, Bank of America, Merrill Lynch, the U.S. Attorney’s Office, U.S. Bankruptcy Court, and the Social Security Administration’s Office of Hearings and Appeals. The CFC stands on the former site of the Powell Building, which was New Haven's first skyscraper.

The Elizabeth R. Hooker House is a historic house at 123 Edgehill Road in New Haven, Connecticut. It is a 2+1⁄2-story brick English-style Arts and Crafts suburban villa designed by Delano and Aldrich and built in 1914 for Elizabeth R. Hooker (1874-1965). Hooker was a 20th-century progressive activist, scholar, and writer in areas such as women's rights, public health care, and historic preservation. The house was added to the National Register of Historic Places in 2010.

The Imperial Granum-Joseph Parker Buildings, also known historically as the Del Monico Building, are a pair of conjoined historic commercial buildings at Elm and Orange Streets in downtown New Haven, Connecticut. Built in 1875 and 1877, the two buildings are among the finest examples of the architecture of that period in the city, with one sporting one of the city's only surviving cast iron facades. The buildings were listed on the National Register of Historic Places in 1986.

The Richard C. Lee United States Courthouse is a monumental courthouse of the United States District Court for the District of Connecticut, located on the east side of the New Haven Green. Built between 1913 and 1919, the structure was spared from a planned demolition in the 1960s, and instead renovated to continue its useful life. For many decades, it also served as a post office, although the post office moved to another location in 1979. It is an excellent example of Classical Revival architecture. It was listed on the National Register of Historic Places in 2015.

The Caroline Nicoll House is a historic house at 27 Elm Street in New Haven, Connecticut, USA. Built in 1828, it is a rare surviving example of an urban townhouse from that period, and a well-preserved example of transitional Federal-Greek Revival architecture. The house was listed on the National Register of Historic Places in 1983.

The New Haven City Hall and County Courthouse is located at 161 Church Street in the Downtown section of New Haven, Connecticut. The city hall building, designed by Henry Austin, was built in 1861; the old courthouse building, now an annex, designed by David R. Brown, was built in 1871–73. They stand on the east side of the New Haven Green. The pair of buildings was listed on the U.S. National Register of Historic Places in 1975. They are significant early examples of High Victorian Gothic architecture in the United States. The city hall building's most striking feature used to be a clock tower that rose above. It is shown in historic drawing among the accompanying photographs. In 1992, a memorial to those involved in the Amistad incident, the Amistad memorial, was erected in front of city hall, facing the New Haven Green, as this was the site of the prison where the Africans aboard the Amistad were held and tried. In January 2012, a PureCell Model 400 was dropped into place behind City Hall in the Millennium Plaza. The heat produced by the fuel cell will be used to heat and cool City Hall and the Hall of Records. It will supply 60 percent of the buildings' heating needs, and 30 percent of cooling needs. According to Giovanni Zinn of the city's Office of Sustainability, the PureCell can help the city save up to $1 million in energy costs over the next ten years.