Built to accommodate as many worshippers as possible in prostrate position: Communal Prayer
No elaborate ritual with a center of visual attention (like an altar)
Emphasizes horizontality as opposed to verticality (Christian Churches).
Roofed part held up by a combination of arches/columns called a HYPOSTYLE hall.
Worshipers face Mecca. Wall opposite entrance faces Mecca (quibla).
QUIBLA (the direction toward Mecca)usually marked by a niche (often domed) called a MIHRAB