_Byzantine._--Symbolic, rich, elaborate. Conventional
forms, principal architectural feature--dome.
_Saracenic._--Gorgeous coloring, graceful curves.
Forms entirely geometric. Arabesque, geometrical
tracery, interlacing.
_Gothic._--Imposing, grand. Pointed arches, clustered
columns, vaulted roof, spire buttress. Forms both natural
and conventional. Stained glass.