A brief book on the two Holy Mosques in Saudi Arabia, the Holy Mosque in Makkah is the most revered place of worship for Muslims around the world. At the center of the Mosque is the Ka’aba, which literally means ’cube’ in Arabic. All Muslims are required to face in the direction of the Ka’aba five times every day when offering their prayers. The Prophet’s Mosque in Madinah is the second most revered place of worship for Muslims around the world. Millions of Muslims visit the Mosque each year, to worship, to visit the Prophet’s grave, and to see the city that gave birth to Islam.