The
pilaster is an in
classical architecture used to give the appearance of a supporting
column and to articulate an extent of wall, with only an ornamental function. It consists of a flat surface raised from the main wall surface, usually treated as though it were a
column, with a
capital at the top,
plinth (base) at the bottom, and the various other elements. In contrast to a pilaster, an
engaged column or
buttress can support the structure of a wall and roof above.