arch: vertical curved structure that spans a space and may or may not support a load

window: opening to admit light or air

door: flat, movable structure used to open and close an entrance

column: structural element sustaining the weight of a building

angel: supernatural being or spirit in certain religions and mythologies

foil: artistic representation of circular leaf shapes used in architecture

square: regular quadrilateral

cross: geometrical figure

circle: simple curve of Euclidean geometry