The key beliefs in Islam are in the five pillars of Islam. These are the faith statement that there is one god called Allah and the prophet Muhammad is his messenger, pray at a mosque facing Mecca 5 times daily, charity, pilgrimage to Mecca, and fasting. Some sacraments that Muslims believe in are fasting during the month of Ramadan, which is not eating during daylight hours, and Hajj, an annual trip taken by many Muslims to the city of Mecca. The place of worship for Muslims is a mosque, and a minaret is a tower on which Muslims pray. An Imam is a prayer leader in Islam. A Mullah is a teacher and a Muezzin leads the call to prayer. The holy book for Muslims is the Qu'ran. Holy days for Islam are Ramadan, Ed al Fitr, and Hajj. Ramadan is a time when Muslims fast during daylight hours, Ed al Fitr is a celebration about the end of Ramadan with gifts, food, family, and thanks, and Hajj is the annual pilgrimage to Mecca, as said before. The Dome of the Rock is a holy site for Muslims as is Mecca. Abraham is a common figure for this religion, as Islam was founded by him. Muslims view Allah as the most holy figure in Islam, although Muhammad is very important as well. Allah is the only god in this religion, which is called monotheism.