In architecture, pila (Italian for "pillar" or "pier") generally refers to a load-bearing vertical support, often square or rectangular in cross-section. It's broader than the term "column," which typically implies a circular or cylindrical support. A pila can be constructed of various materials, including brick, stone, concrete, or even timber.
The term is frequently used to describe the large, often massive, piers that support arches, vaults, and bridges. Pilas can be plain and functional, or highly ornamented with moldings, carvings, and pilasters. They are a key element in many architectural styles, from Romanesque and Gothic to Renaissance and Baroque.
Functionally, a pila transfers weight from above down to the foundation. The design and construction of a pila must carefully consider the anticipated loads and stresses. The dimensions and materials are chosen to ensure stability and prevent buckling or collapse.
In ecclesiastical architecture, "pila" might specifically refer to a stoup or holy water font, but the broader architectural usage denotes the structural support element described above.
The term should not be confused with "pile," which refers to a driven foundation element.