Colonnaded porch or entrance to a structure, or a covered walkway supported by regularly spaced columns. The portico is a principal feature of Greek temple architecture and thus a prominent element in Roman and all subsequent Classically inspired structures.
Learn more about portico with a free trial on Britannica.com.
A portico is a porch that is leading to the entrance of a building, or extended as a colonnade, with a roof structure over a walkway, supported by columns or enclosed by walls. This idea first appeared in Ancient Greece and has influenced many cultures, including most Western cultures.
Some famous examples of porticos are the East Portico of the United States Capitol, and the portico adorning the Pantheon in Rome.
Bologna, Italy, is very famous for its porticos. In total, there are over 45 kilometres of arcades, some 38 in the city center. The longest portico in the world, about 3.5 km, leads from the edge of the city up to Sanctuary of the Madonna di San Luca.
Palladio was a pioneer of using temple-fronts for secular buildings. In the UK, the temple-front applied to The Vyne, Hampshire was the first portico applied to an English country house.
A pronaos is the inner area of the portico of a Greek or Roman temple, situated between the portico's colonnade or walls and the entrance to the cella, or shrine. Roman temples commonly had an open pronaos, usually with only columns and no walls, and the pronaos could be as long as the cella. The word pronaos is Greek for "before a temple". In Latin, a pronaos is also referred to as an anticum or prodomus.
The tetrastyle has four columns; it was commonly employed by the Greeks and the Etruscans for small structures such as public buildings and amphiprostyles.
The Romans favoured the four columned portico for their pseudoperipteral temples like the Temple of Portunus, and for amphiprostyle temples such as the Temple of Venus and Roma, and for the prostyle entrance porticos of large public buildings like the Basilica of Maxentius and Constantine.
The White House' North Portico is perhaps the most famous four-columned portico in the United States.
Some well-known examples of classical Doric hexastyle Greek temples:
Hexastyle was also applied to Ionic temples, such as the prostyle porch of the sanctuary of Athena on the Erechtheum, at the Acropolis of Athens.
Octostyle buildings had eight columns; they were considerably rarer than the hexastyle ones in the classical Greek architectural canon. The best-known octostyle buildings surviving from Antiquity are the Parthenon in Athens, built during the Age of Pericles (450–430 B.C), and the Pantheon in Rome (125 A.D). The destroyed Temple of Divus Augustus in Rome, the centre of the Augustan cult, is shown on Roman coins of the 2nd century AD as having been built in octostyle.