Often overlooked, doors are perhaps the most important feature of a building. They are the means by which we escape the often crowded and chaotic streets of the city. Every building has one (well, maybe except for the Raymond Street Jail which was accidentally constructed in 1836 sans front door), but some outfit this largely utilitarian feature with more panache than others. This collection highlights some the city's loveliest historic doorways, from the simple but classic columns of early 19th century Federal rowhouses to the gloriously geometric brickwork of Art Deco apartment houses, and everything in-between.

Labor College, ca. 1972. The Mayan-inspired B.W. Mayer Building was completed to the plans of architect Herman Lee Meader in 1916. The facade of the seven-story building is awash in brickwork, terra cotta snakes and skulls, and turquoise details. Originally offices, the building was bought in 1923 by the International Ladies Garment Workers Union, a trade union, and in 1930 it became a trade school for the Electrical Workers. The Labor College was established in 1971 as the first such program in the United States. Affiliated with the SUNY system it focused on work, workers and the working-class presence — social, cultural and institutional — in a historical and contemporary context. The building was bought in 1994 by the Society of Friends (Quakers) who converted it into the Friends House, a residence for people with AIDS.