The term 'CATHEDRAL SITE' can be broken down into two parts: 'CATHEDRAL' and 'SITE'. The word 'APSE' is a four-letter solution to the crossword puzzle, and it refers to a large semicircular or polygonal recess in a church, usually at the east end, containing the altar. An APSE is often found in cathedrals, which are large and impressive churches that are usually the center of a diocese and the seat of a bishop. Therefore, the term 'CATHEDRAL SITE' can be interpreted as the location of a CATHEDRAL, which is typically the APSE.