Click on photos for larger size	All examples are from churches in Buffalo, New York
	Apse The recess, usually semicircular, at the end of a Roman basilica or a Christian church. Illustration from St. Louis RC Church
	Arcade A series of arches supported on piers or columns. Illustration from St. Louis RC Blind Arcade: An arcade applied to a wall surface, with no actual openings, to serve as a decoration.
	Baldachino / baldachin / baldacchino / baldaquin An ornamental canopy over an altar, usually supported by columns, or a similar form over a tomb or throne
	Basilica In Roman architecture, a public building for assemblies, especially tribunals, rectangular in plan, entered on a long side. In Christian architecture, an early church somewhat resembling the Roman basilica; usually entered from one end with an apse at the other creating an axial plan.
	Bay A compartment that serve as a unit of division in a building. in a Gothic cathedral the transverse arches and adjacent piers of the arcade divide the building into bays, the design of which is an architectural unit repeated in each bay. Illustration from St. Louis' RC
	Buttress (BUT ris) A structure, usually brick or stone, built against a wall for support or reinforcement. Pier Buttress: an exterior pier counteracting the thrust of a vault or arch. Flying Buttress: masonry support consisting usually of a pier or buttress standing apart from the main structure and connected to it by an arch. Illustration from Asbury Delaware Ave.
	Capital The top part of a pillar or column Illustration from St. Francis Xavier RC
	Cell One of the compartments of a groin or rib vault, in the Romanesque period usually of plastered rubble, in the Gothic period of neatly coursed stones Illustration from St. John's Grace Episcopal
	Chancel (CHAN sul) The space around the altar of a church for the clergy and sometimes the choir, often enclosed by a lattice or a railing. Illustration from Central Presbyterian
	Chapel "A chapel is a holy place or area of worship for Christians, which may be attached to an institution such as a large church, a college, a hospital, a palace, a prison or a cemetery, or may be free-standing and unattached to another building." - Wikipedia: Chapel
	Clerestory Also "clearstory." (CLEAR story) The upper part of the nave, transepts, and choir of a church, containing windows Illustration from St. Louis' RC
	Crocket A decorative feature carved in various leaf shapes and projecting at regular intervals from the angles of spires, pinnacles, canopies, gables, etc., in Gothic architecture. Illustration from St. Louis' RC
	Crossing The space at the interior intersection of the nave, chancel, and transept of a church; often surmounted by a crossing tower or dome.
	Cruciform Shaped like a cross. This is basic design for many Christian churches.
	Dome A vault of even curvature erected on a circular base. The section can be segmental, semicircular, pointed, or bulbous.
	Foil A lobe or leaf-shaped curve formed by the cusping of a circle or an arch. The number of foils involved is indicated by a prefix, e.g. trefoil, quatrefoil, multifoil Illustration from Asbury Delaware Ave.
	Fresco The art of painting on fresh, moist plaster with pigments dissolved in water.
	Gothic Revival
	Icon Illustration from St. Louis RC
	Lancet Window A slender pointed-arched window. Illustration from St. John's Grace Episcopal
	Mosaic A picture or decorative design made by setting small colored pieces, as of stone or tile, into a surface.
	Narthex Greek for "enclosure" An enclosed passage between the main entrance and the nave of a church. The narthex is an entryway or gathering room leading into a church. The area is sometimes referred to as "vestibule" or "foyer." In the narthex people often gather before and after a service to greet each other It is an area for bridging the "sacred" and the "secular." "In early Christian architecture a portion of the church at the west end, separated from the nave by a low wall or screen and reserved for the catechumens (ones being taught the principles of Christianity), energumens (ones possessed by an evil spirit,) and penitents who were not admitted amongst the congregation. The narthex was of two kinds, exterior and interior: the former consisted of an open atrium arcade continued across the front of the church" - New Advent (online April 2021) St. Andrew's Episcopal Church Calvary Episcopal Church, Williamsville, NY
	Nave From navis, ship, an early symbol of the church. The central aisle; the part of a church located between the chief entrance and the chancel, and separated from the aisles by piers or columns. Illustration from St. Ann's RC
	Pinnacle A small turret-like termination crowning spires, buttresses, the angles of parapets, etc.; usually of steep pyramidal or conical shape and ornamented, e.g., with crockets. Illustration from St. Ann's RC
	Reredos An ornamental screen or wall at the back of an altar Illustration from St. Ann's RC Church
	Rib One of the curved pieces of an arch Illustration from St. Ann's RChurch
	Romanesque Revival Style of architecture, popular in U.S. 1870-1900, distinguished by round arches.
	Rose Window Also: Wheel Window The round window with tracery frequently found on the facades of Gothic churches. Illustration from  St. Louis RC Church
	Sanctuary (SANGK choo air ee) 1- The holiest part of a sacred place, as in a Christian church around the altar. 2- A sacred place, such as a church, temple or mosque. Illustration from St. Ann's RC
	Side aisle Aisle(s) to the side of the nave (central aisle) Illustration from St. Louis RC
	Tracery The ornamental intersecting work in the upper part of a window, screen, or panel, or used decoratively in blank arches and vaults. Illustration from St. John's Grace Episcopal
	Transept (TRAN sept) The crosswise part of a cruciform church, crossing the nave at right angles. Illustration from St. Louis RC
	Vault An arched structure of stone, brick, or reinforced concrete, forming a supporting structure of a ceiling or roof Barrel vault:/Barrel roof: A vault having a semicylindrical roof Groin(ed) vault/Cross vault: A compound vault in which barrel vaults intersect Rib(bed) vault: A vault supported by or decorated with arched diagonal ribs (rib: one of the curved pieces of an arch) Illustration from St. Ann's RC
	Vestibule (VES ti byool) A small entrance hall or passage between the outer door and the interior of a house or building