
Under the portico of the Pantheon

Temple diagram with location of the 'pronaos' highlighted
A 'portico' is a
porch 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
Beata Vergine di San Luca Basilica.
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''.
Types of portico
The different variants of porticos are named by the number of columns they have.
Tetrastyle
The tetrastyle has four columns. Tetrastyle was commonly employed by the
Greeks and the
Etruscans for small structures such as public buildings and
amphiprostyle altars devoted to the large Hexastyle temple in a sanctuary.
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.
Hexastyle
Hexastyle buildings had six columns and were the standard
facade in canonical Greek
Doric architecture between the archaic period 600–550 B.C up to the
Age of Pericles 450–430 B.C.
Greek hexastyle

The hexastyle Temple of Concord at
Agrigentum (''c.'' 430 B.C)
Some well-known examples of classical Doric hexastyle
Greek temples:
★
The group at Paestum comprising the Temple of
Hera (''c.'' 550 B.C), the Temple of
Apollo (''c.'' 450 B.C), the first Temple of
Athena ("Basilica") (''c.'' 500 B.C) and the second Temple of Hera (460–440 B.C)
★ The Temple of
Athena ''Aphaia (the invisible)'' at
Aegina ''c.'' 495 B.C
★ Temple E at
Selinus (465–450 B.C) dedicated to Hera
★ The Temple of
Zeus at
Olympia, now a ruin
★ Temple F or the so-called "Temple of
Concord" at
Agrigentum (''c.'' 430 B.C), one of the best preserved classical Greek temples, retaining almost all of its
peristyle and
entablature.
★ The "unfinished temple" at
Segesta (''c.'' 430 B.C)
★ The
Hephaesteum below the
Acropolis at Athens, long known as the "Theseum" (449–444 B.C), the most intact Greek temple surviving from antiquity)
★ The Temple of
Poseidon on Cape
Sunium (''c.'' 449 B.C)
Hexastyle was also applied to
Ionic temples, such as the prostyle porch of the
Sanctuary of Athena on the
Erechtheum at the
Acropolis,
Athens.
Roman hexastyle
With the colonization by the Greeks of southern Italy, hexastyle was adopted by the
Etruscans and subsequently acquired by the
ancient Romans. Roman taste favoured narrow pseudoperipteral and amphiprostyle buildings with tall columns, raised on
podiums for the added pomp and grandeur conferred by considerable height. The
Maison Carrée at
Nîmes is the best-preserved Roman hexastyle temple surviving from
antiquity.
Octostyle

The western side of the Parthenon.
Octostyle had eight columns. Octostyle buildings are rarer than
Hexastyle 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).
Decastyle
The decastyle has ten columns; as in the temple of
Apollo Didymaeus at
Miletus, and the portico of
University College London.
See also

Portico close to piazza Santo Stefano
Bologna
★
Classical architecture
★
List of classical architecture terms
★
Colonnade
★
Hypostyle
★
Loggia
★
Peristyle
★
Stoa
References
★ ''Greek architecture''
Encyclopaedia Britannica, 1968
★ Stierlin, Henri ''Greece: From Mycenae to the Parthenon'',
TASCHEN, 2004, Editor-in-chief Angelika Taschen, Cologne, ISBN 3-8228-1225-0
★ Stierlin, Henri ''The Roman Empire: From the Etruscans to the Decline of the Roman Empire'',
TASCHEN, 2002, Edited by Silvia Kinkle, Cologne, ISBN 3-8228-1778-3