The Flatiron Building is a 22-story (86.9 m) high triangular building located at 175 Fifth Avenue, Manhattan, New York. Designed by Daniel Burnham and Frederick Dinkelberg, at its time, it was one of the tallest buildings in New York after its completion in 1902.

The Flatiron Building is one of the most iconic buildings in the world and a classic symbol of New York City. The name Flatiron comes from the resemblance of the building's shape to a clothes iron (iron in English). Many people also call the shape of this building similar to a slice of cake or pizza 🍰🍕.

The Flatiron Building is located in a triangular block consisting of Fifth Avenue to the west, Broadway to the east, and East 22nd Street to the south. Adjacent buildings include the Toy Center to the north and Madison Green to the southeast. The Flatiron Building is also part of the Ladies' Mile Historic District. The entrance to the 23rd Street New York City Subway station is also adjacent to the building.

A New York City icon, the Flatiron Building is a popular spot for tourist photographs, making it one of the most photographed buildings in the world.

Today, the Flatiron Building is often used in television commercials and documentaries as an iconic and easily recognizable symbol of New York City. For example, in the 1998 film Godzilla, the Flatiron Building is accidentally destroyed by the US Army while pursuing Godzilla. In Spider-man, the Flatiron building is described as the headquarters of the Daily Bugle, where Peter Parker works as a freelance photographer.