Pilasters are a vertical ledge, rectangular in the intersection, on the surface of the wall or the pillar. They have the same three parts as the columns: the barrel, the base and the captain.
Pilasters are used as decorative decoration and as an element of building design. They can strengthen the wall, or in the design decision to make the separation of facade parts.
The use of pilasters in arched openings is very effective, since they not only emphasize openings of arches, but also visually increase their height.