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The 23rd Street Fire was an incident that took place in the Flatiron District neighborhood of Manhattan, New York City, on October 17, 1966. A group of firefighters from the New York City Fire Department responding to a fire at 7 East 22nd Street entered a building at 6 East 23rd Street as part of an effort to fight the fire. Twelve firefighters were killed after the floor collapsed, the largest loss of life in the department's history until the collapse of the World Trade Center in the September 11 attacks of 2001.

One Madison is a luxury residential condominium tower located on 23rd Street between Broadway and Park Avenue South, at the foot of Madison Avenue, across from Madison Square Park in the Flatiron District of Manhattan, New York City. The building's official address and main lobby entrance is at 23 East 22nd Street, rather than at 1 Madison Avenue; there is no public entrance on 23rd Street. The building as constructed has 53 residential units across 60 stories. Construction started in 2006, and it topped out during 2010, but remained incomplete for another three years due to financial difficulties. At a height of 621 feet (189.3 m), One Madison is one of the slenderest buildings in New York City, with a height-to-width ratio of 12:1.

Jua is a Korean restaurant in New York City. The restaurant has received a Michelin star.

Packard's Business College or Packard Business College was a post-secondary business college in New York City which provided a concentrated one-year education in practical business subjects, such as arithmetic, bookkeeping, penmanship, and business correspondence. The school was well respected for the quality of its graduates.The school was founded 1858, under the name of Bryant, Stratton & Packard's Mercantile College, by Mr. S. S. Packard and was the New York branch of a chain known as the Bryant & Stratton chain of business colleges. In 1867 Mr. Packard purchased the Bryant & Stratton interest in the New York College, and changed its name to Packard's Business College.The teachers employed in the college were chosen for their practical and theoretical knowledge of business affairs. A Packard Business College, situated at 22nd and Broadway, New York, was featured in the 1947 film The Shocking Miss Pilgrim, whose initial graduates are described as "the first group of typewriters to graduate from any business college anywhere in the world".

An outdoor sculpture of Roscoe Conkling by John Quincy Adams Ward is installed near Madison Avenue and 23rd Street in Madison Square Park in Manhattan, New York.

935–939 Broadway is a six-story Italianate brownstone structure designed by the architect Griffith Thomas in the Flatiron District of Manhattan, New York City.

The Flatiron District is a neighborhood in the New York City borough of Manhattan, named after the Flatiron Building at 23rd Street, Broadway and Fifth Avenue. Generally, the Flatiron District is bounded by 14th Street, Union Square and Greenwich Village to the south; the Avenue of the Americas (Sixth Avenue) and Chelsea to the west; 23rd Street and Madison Square (or NoMad) to the north; and Park Avenue South and Gramercy Park to the east.Broadway cuts through the middle of the district, and Madison Avenue begins at 23rd Street and runs north. At the north (uptown) end of the district is Madison Square Park, which was completely renovated in 2001. The Flatiron District encompasses within its boundaries the Ladies' Mile Historic District and the birthplace of Theodore Roosevelt, a National Historic Site. The Flatiron District was also the birthplace of Silicon Alley, a metonym for New York's high technology sector, which has since spread beyond the area.The Flatiron District is part of Manhattan Community District 5. Residents are represented by the Flatiron Alliance neighborhood association and nearby businesses by the Flatiron/23rd Street Partnership business improvement district, though the two have different (partially overlapping) boundaries.

Rezdôra is an Italian restaurant in New York City. The restaurant has received a Michelin star.

William Henry Seward is an outdoor bronze sculpture of William H. Seward by artist Randolph Rogers, located in Madison Square in Manhattan, New York. Dedicated on September 27, 1876, it believed to be the city's first monument depicting a New York resident. The portrait statue is set on a red Levante marble pedestal.

The 23rd Street station is a local station on the BMT Broadway Line of the New York City Subway. Located at the intersection of 23rd Street, Broadway, and Fifth Avenue in the Flatiron District of Manhattan, it is served by the R train at all times except late nights, the W train on weekdays, the N train during late nights and weekends, and the Q train during late nights.

900 Broadway, also known as the Goelet Building, is a historical structure commissioned by members of the Goelet family located at the corner of Broadway and East 20th Street, in the Ladies' Mile Historic District of Manhattan, New York City. It was designed by Stanford White of McKim, Mead & White, and built in 1886–1887. The building was enlarged in 1905–06 by Maynicke & Franke.

Veritas was a restaurant in Manhattan, New York City. The restaurant operated from 1999 to 2013, and had received a Michelin star.