Trail:

Glossary

Bag-rubbed pointing
Pointing (exposed mortar jointing) that is flush at the edges and gently recessed in the middle.
Bailey
An enclosure defended by a ditch and palisade, usually as part of a motte-and-bailey castle.
Balance beam
(Canals): Beam projecting horizontally for opening and closing lock gates.
Balconette
A small balcony or window-guard attached to an individual window.
Baldacchino
Free-standing canopy, originally fabric, over an altar. Compare ciborium.
Ballflower
Globular flower of three petals enclosing a ball. Typical of the years c. 1300-30, during the Decorated phase of English medieval architecture.
Baluster, balustrade
Pillar or pedestal of bellied form. Balusters: vertical supports of this or any other form, for a handrail or coping, the whole being called a balustrade. Blind balustrade: the same applied to the wall surface. A splat baluster is flat and has shaped sides.
Banded rustication
London
Rustication (the exaggerated treatment of masonry to give an effect of strength), with only the horizontal joints emphasized.
Baptistery
Division of a church designed to house the font; also a separate building for the same purpose.
Barbican
Outwork defending the entrance to a castle.