Note:  Do not rely on this information. It is very old.

Column

Column, in architecture, a rounded pillar with a base, shaft, and capital (q.v.). Occasionally a column stands alone as a monument (as in the Nelson column in Trafalgar Square), or is a purely ornamental adjunct to a building (as in the Taylorian Institution at Oxford). In Gothic and Norman architecture a column usually supports one side of an arch, in classic architecture the entablature (q.v.). In military language, the column is the formation of the army when marching or manoeuvring.

Click for more about Square