A vestibule // is an anteroom (antechamber) or small foyer leading into a larger space, such as a lobby, entrance hall, passage, etc., for the purpose of waiting, withholding the larger space view, reducing heat loss, providing space for outwear, etc. The term applies to structures in both modern and historical architecture since ancient times. In modern architecture, vestibule typically refers to a small room next to the outer door and connecting it with the interior of the building. In ancient Roman architecture, vestibule (Latin: vestibulum) referred to a partially enclosed area between the interior of the house and the street.
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In contemporary usage, a vestibule constitutes an area surrounding the exterior door. It acts as an antechamber between the exterior and the interior structure. Often it connects the doorway to a lobby or hallway. It is the space one occupies once passing the door, but not yet in the main interior of the building.
Although vestibules are common in private residences, as a modified mud room, they are especially prevalent in more opulent buildings, such as government ones, designed to elicit a sense of grandeur by contrasting the vestibule's small space with the following greater one, and by adding the aspect of anticipation. The residence of the White House in the United States is such an example, but somewhat confusing. At the north portico, it contains a tiny vestibule now between the doors flushed with the outer and inner faces of the exterior wall of, and in the past inside, the Entrance Hall (called incorrectly Vestibule) separated from the not much bigger Cross Hall by just 2 double columns. The difference in sizes between a vestibule and the following space is better illustrated by the - so called - entrance (15) to the main gallery in the Solomon R. Guggenheim Museum by Frank Lloyd Wright. Many government buildings mimic the classical architecture from which the vestibule originates.
A purely utilitarian use of vestibules in modern buildings is to create an "air lock" entry. Such vestibules consist of merely a set of inner doors and a set of outer doors, the intent being to reduce air infiltration to the building by having only one set of doors open at any given time.
An ATM vestibule is an enclosed area with automated teller machines that is accessible from the outside of a building, but typically features no further entrance beyond the vestibule. There may be a secure entrance to the vestibule which requires a card to open.
The vestibule on a railroad passenger car is an enclosed area at the end of the carbody, usually separated from the main part of the interior by a door, which is power-operated on most modern equipment. Entrance to and exit from the car is through the side doors, which lead into the vestibule. When passenger cars are coupled, their vestibules are joined by mating faceplate and diaphragm assemblies to create a weather-tight seal for the safety and comfort of passengers who are stepping from car to car. In British usage the term refers to the part of the carriage where the passenger doors are located; this can be at the ends of the carriage (on long-distance stock) or at the 1/4 and 3/4 of length positions (typical on modern suburban stock).
Vestibules were common in ancient Greek temples. Due to the construction techniques available at the time, it was not possible to build large spans. Consequently, many entrance ways had two rows of columns that supported the roof and created a distinct space around the entrance.
In ancient Roman architecture, where the term originates, a vestibule was a space between the interior of a building and the street. The structure was a mixture between a modern hall and porch. Upon entering a Roman house or domus, one would have to pass through the vestibule before entering the atrium.
From the 5th century on vestibules were used in Christian churches in both the east and west.
- Harris, Cyril (2005). Dictionary of Architecture and Construction (4 ed.). McGraw Hill Professional. p. 1044. ISBN 0071589015.
- Vestibule. The Oxford English Dictionary. http://www.oed.com Online edition, December 2006
- Kovacs, Eduard (7 February 2012). "Fraudsters Install Skimmer on ATM Vestibule Door". Softpedia. Retrieved 13 December 2013.
- Tarbel, F.B. "A History of Ancient Greek Art.". Retrieved 2006-03-02.
- McManus, Barbara. "Sample Plan of a Roman House". VRoma. The College of New Rochelle. Retrieved 2006-03-02.
- "Vestibule (Porch)". Catholic Encyclopedia. New York: Robert Appleton Company. 1913.