Colonnade Colonnade In classical architecture, a colonnade is a long sequence of columns joined by their entablature, often free-standing, or part of a building. Paired or multiple pairs of columns are normally employed in a colonnade which can be straight or curved. The space enclosed may be covered or open. In St. Peter's Square in Rome, Bernini's great colonnade encloses a vast open elliptical space. When in front of a building, screening the door (Latin "porta"), it is called a portico, when enclosing an open court, a peristyle. A portico may be more than one rank of columns deep, as at
Great Colonnade at Palmyra March 2016. However, large parts of it are still intact. The colonnade consists of three sections that were built separately over the course of the second and third century CE. The western stretch of the colonnade is the oldest and started at the West Gate near the Funerary Temple. The eastern section stretched from the Monumental Arch in the center of the town to the entrance of the Temple of Bel. The middle section was built last to connect the two separate colonnades. It met the western stretch at the Great Tetrapylon, and the eastern stretch at the Monumental Arch.