Local and international Muslims attending mosques for Friday Prayers session at the town of al-Jubail ( الجبيل), located about 490km east of  Riyadh, Saudi Arabia. al-Jubail  is the Largest industrial city in the Middle East. It also holds the middle east’s largest and world’s 4th largest petrochemical company. It comprises the Old Town of al-Jubail, which was a small fishing village until 1975, and the new industrial area. al-Jubail industrial city is the largest civil engineering project in the world today.