Question: Which building is located at the center of City Hall Park in the Civic Center area of Lower Manhattan and was designed by Joseph-François Mangin?
Context: The Basilica of Saint Patrick's Old Cathedral, or Old St. Patrick's, is located at 260–264 Mulberry Street between Prince and Houston Streets in the Nolita neighborhood of Manhattan, New York City, with the primary entrance currently located on Mott Street.  Built between 1809 and 1815, and designed by Joseph-François Mangin in the Gothic Revival style, it was the seat of the Roman Catholic Archdiocese of New York until the current Saint Patrick's Cathedral opened in 1879.  Liturgies are celebrated in English, Spanish, and Chinese. The City Hall Park (Danish: Rådhusparken) is a public park in central Aarhus, Denmark.  The park is situated by the City Hall in the Indre By neighborhood in Midtbyen, along the street "Frederiks Allé" to the west, Park Allé to the east and "Banegårdsgade" to the south.  The park lies within a scenic semi-circle of some of the more important cultural and political institutions in the city; the Concert Hall, the ARoS Art Museum, Vester Allés Kaserne and the city hall.  The City Hall Park was listed along with the adjacent city hall on 10 March 1995. New York City Hall, the seat of New York City government, is located at the center of City Hall Park in the Civic Center area of Lower Manhattan, between Broadway, Park Row, and Chambers Street.  The building is the oldest city hall in the United States that still houses its original governmental functions, such as the office of the Mayor of New York City and the chambers of the New York City Council.  While the Mayor's Office is in the building, the staff of thirteen municipal agencies under mayoral control are located in the nearby Manhattan Municipal Building, one of the largest government buildings in the world. Sacramento City Hall is a five-story, 267,000-square-foot building that combines modern and historic structures in Sacramento, California.  The building can house up to 730 staff members.  Prominent local architect Rudolph A. Herold designed the building in 1908.  Completed in 1909, the building is located at 915 I Street.  Sacramento City Hall went through a major $11 million restoration from 2003 to 2005.  The restoration was part of an overall $60 million civic center project with city hall as the cornerstone.  Another part of the civic center project was the construction of underground parking garage for 170 cars.  Sacramento City Hall now houses all of the city's significant municipal functions. The Colorado State Capitol Building, located at 200 East Colfax Avenue in Denver, Colorado, United States, is the home of the Colorado General Assembly and the offices of the Governor of Colorado and Lieutenant Governor of Colorado.  The building is intentionally reminiscent of the United States Capitol.  Designed by Elijah E. Myers, it was constructed in the 1890s from Colorado white granite, and opened for use in November 1894.  The distinctive gold dome consists of real gold leaf, first added in 1908, commemorating the Colorado Gold Rush.  The building is part of Denver's Civic Center area.  It was listed on the National Register of Historic Places as part of the Civic Center Historic District in 1974, and became part of the Denver Civic Center National Historic Landmark District in 2012. Joseph-François Mangin was born on June 10, 1758 in Dompaire, in the Vosges region of France.  He was a French-American architect who is noted for designing New York City Hall and St. Patrick's Old Cathedral in New York City. West Frankfort City Hall, located at 108 N. Emma St., is the former city hall of West Frankfort, Illinois.  The city hall was built in 1921 to serve the city, which had no city hall up until that time.  West Frankfort was first settled in 1895, when the Frankfort railway station was built 1.5 mi west of Frankfort; the original city of Frankfort merged into West Frankfort in 1923.  The city hall is a two-story brick building which was built by contractor S. M. Wilson at a cost of $35,000.  It was used as the city hall through 1979, when a new City Hall was constructed; the building is now used by meetings of the West Frankfort Civic Center Authority. The Park Theatre, originally known as the New Theatre, was a playhouse in New York City, located at 21, 23, and 25 Park Row, about 200 ft east of Ann Street and backing Theatre Alley.  The location, at the north end of the city, overlooked the park that would soon house City Hall.  French architect Marc Isambard Brunel collaborated with fellow émigré Joseph-François Mangin and his brother Charles on the design of the building in the 1790s.  Construction costs mounted to precipitous levels, and changes were made in the design; the resulting theatre had a rather plain exterior.  The doors opened in January 1798. Civic Center/Grand Park, formerly Civic Center, is a heavy-rail subway station in the Los Angeles County Metro Rail system.  It is located on Hill Street between 1st and Temple Streets in the Civic Center area of Downtown Los Angeles.  The station is officially named Civic Center/Grand Park/Tom Bradley after former Los Angeles mayor Tom Bradley, who had a pivotal role in turning the subway into reality. Mid-Hudson Civic Center is a venue located in Poughkeepsie, New York, consisting of Mair Hall (a concert and convention hall) and the McCann Ice Arena (an ice skating venue).  It was built in the 1970s as part of the general attempt at rehabilitation of the central district of the City of Poughkeepsie.  It is located at 14 Civic Center Plaza, on a segment of what was formerly known as Market Street near the former Main Mall.  The Poughkeepsie Grand Hotel, at 40 Civic Center Plaza, is adjacent on the same block and was originally designed to be constructed concurrently with the civic center and financed by Hilton, but the hotel construction was abandoned after the foundation was laid.  Four years after the completion of the Mid-Hudson Civic Center, Radisson Hotels bought the hotel property and after a re-design of the original hotel plans, construction of the hotel resumed.
Answer: New York City Hall