A basilica is a large, rectangular church building with a central NAVE and two aisles, typically topped by a dome or cupola. The term 'basilica parts' refers to the various components of this type of structure. The naves are the two main sections of the church, running parallel to each other and separated by an aisle. Apses are the semicircular or polygonal recesses at the end of the NAVE, often containing an altar. The NAVE is the central part of the church, usually extending from the entrance to the APSE. An APSE is a small, semicircular or polygonal recess at the end of the NAVE, often containing an altar. Pews are the long benches in the NAVE where people sit during services. The Pieta is a sculpture of the Virgin Mary holding the body of Jesus after his crucifixion, usually found in the APSE.