Engaged column
An engaged column is an architectural element in which a column is embedded in a wall and partly projecting from the surface of the wall, which may or may not carry a partial structural load. Sometimes defined as semi- or three-quarter detached, engaged columns are rarely found in classical Greek architecture, and then only in exceptional cases, but in Roman architecture they exist in abundance, most commonly embedded in the cella walls of pseudoperipteral Roman temples and other buildings.