thumb|250px|Two decorative Corinthian architecture|Corinthian pilasters in the Church of Saint-Sulpice (Paris)
A pilaster is a flat, vertical architectural element that projects slightly from a wall and is typically decorated with the same style as classical columns. Pilasters serve both practical and aesthetic purposes, providing structural support while adding visual interest and a sense of order to building facades.
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thumb|250px|Two decorative Corinthian architecture|Corinthian pilasters in the Church of Saint-Sulpice (Paris)
In architecture, a pilaster is both a load-bearing section of thickened wall or column integrated into a wall, and a purely decorative element in classical architecture which gives the appearance of a supporting column and articulates an extent of wall. As an ornament 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 column elements. In contrast to a Classical pilaster, an engaged column or buttress can support the structure of a wall and roof above.
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