COLONNADE  , in

architecture, a range of columns (Ital. colonna) in a row . When extended so as to enclose a temple, it is called a peristyle, and the same term applies when round an open court, as in the houses at Pompeii . When projecting in front of a building, it is called a portico, as in the Pantheon at Rome and the National Gallery in London . When enclosed between wings, as in Perrault's facade to the Louvre, it is correctly described as a colonnade . Colonnades lined the streets of the towns in Syria and Asia Minor, and they were largely employed in Rome .