Ball-flower: An architectural ornament of a ball inserted in the cup of a flower which came into use in the latter part of the 13th. It is generally placed in rows at equal distances in the hollow of a molding.
Buttress: A structure, usually brick or stone, built against a wall for support or reinforcement.
Capital: The crowning feature of a column; the top of a column or pillar.
Cornice: Horizontal moulded projection that completes a building or wall.