What best describes a pilaster?

A pilaster is best described as a rectangular column that projects from a wall. This architectural feature serves both aesthetic and structural purposes, often providing a sense of depth and dimension to the wall it is attached to. Pilasters are typically designed to resemble classical columns and can be found in various styles across different periods of architecture.

Their primary function is to create a visual connection between the wall and the column, embodying the principles of classical architecture. Unlike a full freestanding column, a pilaster is partially embedded in the wall, making it a distinct architectural element that enhances the facade of a building without needing to support an entire structure independently. This allows architects to incorporate classical design elements while still addressing functional requirements in the construction of walls and facades.