Propylon

Propylon, in architectural and archaeological usage, is a monumental gateway or entry structure at the entrance to a sacred precinct, temple complex, or urban ensemble. The term is derived from the Greek propylaion, literally describing a gateway situated before a principal enclosure. In classical texts and in modern scholarship, a propylon designates the gateway component that marks the ceremonial approach to a sanctuary, rather than the interior sanctum itself.

Design and features: A propylon may be a freestanding gate with one or more arches, sometimes integrated with a gatehouse or pylon-like wings. It commonly forms part of a larger monumental entrance such as a peripteral court or forecourt, and could include a pronaos or vestibular spaces projecting ahead of the inner courts. The function is both practical (access control, crowd management) and ceremonial/ritual, framing views toward the precinct and reinforcing the hierarchy of space.

Examples: The most famous is the Propylaea, the monumental gateway to the Acropolis of Athens, built in the 5th century BCE under the direction of Mnesicles. Other sanctuaries across the Greek world, including Olympia, Delos, and various eastern Mediterranean sites, used propylia or propylaea as grand entrances. In scholarly usage, the term contrasts with temples proper, stoas, or other functional buildings, and helps describe the arrangement of sacred precincts.