The symbols of Islam are the crescent moon with the star, the likeness of a mosque and Allah written in Arabic. The crescent moon with the star is not uniformly accepted as a symbol of Islam; it was adopted by the Ottoman Empire, so it is not originally Muslim.
The Islamic religion is based on the belief in one god, Allah, and the Prophet Mohammad. There are five pillars of Islam that are considered mandatory for all followers: fasting, pilgrimage, alms-giving, testimony and prayer. Prayer takes place five times a day, is spoken in Arabic and often includes verses from the Qu'ran.