| Term | Definition |
| basilica | a civic building for legal and other civic proceedings; rectangular in plan with the entrance on the long side |
| nave | a central area of an ancient Roman basilica/church, demarcated from aisles by piers or columns |
| apse | a recess, usually semicircular, in the wall of a Roman basilica or at the east end of a church |
| clerestory | a fenestrated part of a building that rises above the roofs of the other parts |
| narthex | a porch or vestibule of a church |
| transept | the part of church with an axis that crosses the nave at a right angle |
| piers | verticle, freestanding masonry support |
| buttress | exterior masonry structure that opposes lateral thrush of arch or vault |
| rotunda | circular area under a dome |
| baldicchino | canopy on columns, frequently built over an altar |
| cruciform | cross shaped |
| nimbus | halo of aureole appearing around the head of a holy figure ot signify divinity |
| codex and vellum | separate panels of vellum (parchment) bound together at one side |
| diptych | two-paneled painting or altar-piece |