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etc. Bossages are also rustic work, consisting of stones which seem to ad-
vance beyond the surface of the building, by reason of indentures, or chan-
nels left in the joinings; used chiefly in the corners of buildings, and called
rustic quoins. The cavity or indenture may be round, square, chamfered,

beveled, diamond-shaped, or enclosed with a cavetto or listel.
Bond

Brickwork with overlapping bricks. Types of bond include stretcher,
English, header, Flemish, garden wall, herringbone, basket, American, and
Chinese.
Boutant

Type of support. An arc-boutant, or flying buttress, serves to sustain a
vault, and is self-sustained by some strong wall or massive work. A pillar
boutant is a large chain or jamb of stone, made to support a wall, terrace,

or vault. The word is French, and comes from the verb bouter, "to butt" or
"abut".
Bracket (see also corbel)

Weight-bearing member made of wood, stone, or metal that overhangs
a wall.

Bressummer
(literally "breast- beam") - large, horizontal beam supporting the wall
above, especially in a jettied building.

Brise soleil
Projecting fins or canopies which shade windows from direct sunlight.
Bullseye window

Small oval window, set horizontally.
Bulwark
Barricade of beams and soil used in 15th- and 16th-

century fortifications designed to mount artillery. On board ships the term
refers to the woodwork running round the ship above the level of the deck.
Figuratively it means anything serving as a defense. Dutch loanword;

Bolwerk.
Buttress
Vertical member projecting from a wall to stabilize it or to resist the

lateral thrust of an arch, roof, or vault. A flying buttress transmits the
thrust to a heavy abutment by means of an arch or half-arch.

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