Explanation

• The Organization was established upon a decision of the historical summit which took place in Rabat, Kingdom of Morocco on 12th Rajab 1389 Hijra
• Its headquarters is in Jeddah, Saudi Arabia.
• As the largest international organization outside the United Nations.
• The OIC has 57 member countries.
• The first summit was held in Rabat.
• The official languages are Arabic, English, and French.