Decorative trim in alternating rectangles and spaces.
The eaves of a roof are its lower edges, usually projecting beyond the walls of the building to provide weather protection.
A gable is the generally triangular portion of a wall between the edges of a sloping roof. The shape of the gable and how it is detailed depends on the structural system being used (which is often related to climate and availability of materials) and aesthetic concerns. Thus the type of roof enclosing the volume dictates the shape of the gable.
A pediment is a classical architectural element consisting of the triangular section found above the horizontal structure, typically supported by columns. Pediments were used as non-structural elements over windows and doors.
A pilaster is a slightly-projecting column built into or applied to the face of a wall. Most commonly flattened or rectangular in form, pilasters can also take a half-round form or the shape of any type of column, including tortile.
*Definitions taken from Wikipedia
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