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.
Colonnade at the Belvedere on the Pfingstberg palace in Germany
The colonnade of Amenhotep III at the Luxor temple
The Stoa of Attalos in the reconstructed Ancient Agora of Athens
The Great Colonnade at Palmyra, Syria
A column or pillar in architecture and structural engineering is a structural element that transmits, through compression, the weight of the structure above to other structural elements below. In other words, a column is a compression member. The term column applies especially to a large round support with a capital and a base or pedestal, which is made of stone, or appearing to be so. A small wooden or metal support is typically called a post. Supports with a rectangular or other non-round section are usually called piers.
National Capitol Columns at the United States National Arboretum in Washington, D.C.
Columns of the Parliament House in Helsinki, Finland
Column of the Gordon Monument in Waterloo.
Dragon pillar from the Yingzao Fashi, Song dynasty
