Roofridge

Roofridge - Summit line of roof.
Rubble - Fill; unsquared stone not laid in courses.
Rustication - Worked ashlar stone with the faces left rough.

Roofridge - summit line of roof.
Roundel - low, circular, semicircular or U-shaped tower for artillery, projecting from the wall face.
Rubble - fill; unsquared stone not laid in courses.

Roofridge: Summit line of roof. Rose window: A circular window composed of patterned tracery arranged in petal-like formation. Compare with lancet window. Rubble: Fill; unsquared stone not laid in courses.

See also: Hood-mould, Aperture, Bond, Battlement, Church