Architecture Dictionary: O

OBELISKS

tall square pillars, terminating in pyramids

OCTOSTYLE

a portico having eight columns in front.

ODEUM

a structure for the performance of music

OGEE or CYMA REVERSA

a moulding consisting of a round and hollow. Also the name of an arch with a double curve, one concave the other convex.

OEILLETS or EYE-LET-HOLES

small openings or loop-holes, in castellated architecture.