The most important place of worship for Muslims is the Mosque. It is a place where one can find words for Allah every where. On the wall and the ceiling there are verses form the holy koran. On the top of the minaret is the crescent and there are also verses at the bottom of the minaret.
Before Muslims enter the mosque, they must take off their shoes or slippers and take an ablution and make sure they wear clean clothes. Clean clothes means here that the clothes do not contain any dirts (filthy).
Muslims pray facing Ka’ba and they pray in Arabic language only.
(source: New English Concept for SLTP 2, Nanan Suryana, drs. Armico, Bandung)