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Jettying
A building technique used in medieval timber frame buildings in
which an upper floor projects beyond the dimensions of the floor below.

K

Keystone
The architectural piece at the crown of a vault or arch and marks its

apex, locking the other pieces into position.

L

Lacunar
Latin name in architecture for paneled or coffered ceiling, soffit,
or vault adorned with a pattern of recessed panels.

Latticework
An ornamental, lattice framework consisting of a criss-crossed pattern.

Lintel
A horizontal block that spans the space between two supports.
Loculus
An architectural niche that houses a body, as in a catacomb, hypo-

geum, mausoleum or other place of entombment.
Loggia

A gallery formed by a colonnade open on one or more sides. The
space is often located on an upper floor of a building overlooking an open
court or garden.

Lunette
A half-moon shaped space, either masonry or void.

M

Maqsurah (maqsura)

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