A portico is a porch that leads to a building's entrance or is extended as a colonnade, with a roof structure over a walkway supported by columns or enclosed by walls. This concept was popular in ancient Greece and has influenced many cultures, including the majority of Western cultures.
In Greek and Roman architecture a peristyle is a columned porch or open colonnade in a building.
A colonnade is a row of columns spaced at regular intervals in classical architecture, similar to a balustrade. They can be used to support a horizontal entablature, an arcade, or a covered walkway, as well as as part of a porch or portico.
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