On the occasion of the Kingdom’s Founding Day, inevitably come to the fore some of the characteristic features of the personality of the late King Abdulaziz, an inspiring leader and the founder of the great homeland Saudi Arabia. The personality of King Abdulaziz has fascinated many intellectuals and historians around the world, including Chinese historian Professor Yang Yan Hong, who said: “King Abdulaziz was one of the geniuses who provided great services to their nations and homelands with their tremendous and tireless efforts, and they influenced the development and progress of human societies towards the desired goal.” Austrian Dr. Von Diesel, who visited the Kingdom in 1926, described King Abdulaziz as a genius, citing: "If you know that Ibn Saud succeeded in creating an empire whose area exceeded the total areas of Germany, France and Italy together after he was a leader who led only a number of men and with their help, he was able to restore Riyadh, the capital of his ancestors, you have no doubt that this man who does this has the right to be called a genius.” King Abdulaziz was keen to develop Saudi Arabia. During his early reign, he ordered to pay attention to the Two Holy Mosques and their expansion and to serve pilgrims and the visitors of the Two Holy Mosques. During his rule, the government under his directives started building the country’s infrastructure. It worked on establishing schools and hospitals, building villages, rehabilitating the soil, and exploring irrigation water in order to support agriculture. In line with his desire to advance the country, oil exploration operations began in 1933 in some areas of the Kingdom. King Abdulaziz paid attention to external affairs as much as to internal affairs. He dealt with all countries of the world with high-level diplomacy, taking into account the independence of the Kingdom in its opinion and choosing the nature of its relations with all countries, without prejudice to its religious, civilizational and cultural status. He followed the approach of transparency in dealing with issues of concern to his nation. All events to this day have proven his correct vision and correct approach regarding his words and deeds. King Abdulaziz passed away after he established a national approach that his sons followed after him to complete establishing security and peace. King Saud Bin Abdulaziz Al Saud was the first son to follow that approach and work within its framework until the features of progress emerged and the structures of a number of basic institutions and agencies in the country were completed. In the era of the pioneer of Islamic solidarity, King Faisal Bin Abdulaziz Al Saud, who succeeded King Saud, Saudi Arabia made more accomplishments, and during his reign, Saudi Arabia began the implementation of the ambitious five-year plans for development. King Khalid Bin Abdulaziz Al Saud’s reign was distinguished by further work for growth to serve the country and citizens in particular and Islam and Muslims in general. The development plans also connected with each other for the sake of achieving more prosperity and stability. Under King Fahd Bin Abdulaziz Al Saud, who adopted the title Custodian of the Two Holy Mosques, Saudi Arabia continued its tremendous socioeconomic development and emerged as a leading political and economic force. The achievements during the reign of King Fahd were characterized by comprehensiveness and integration to form a comprehensive development process for building a nation and a wise and unique leadership that embodied many qualities that he had, the most prominent of which was his adherence to the Holy Qur’an and Prophet’s Sunnah, and his dedication to serving his homeland, citizens, the Islamic nation and the entire humankind. During the era of Custodian of the Two Holy Mosques King Abdullah Bin Abdulaziz Al Saud, Saudi Arabia witnessed giant developmental achievements throughout the nation in various sectors, including education, health, transportation, industry, electricity, water, agriculture and the economy in general. Today, the Kingdom of Saudi Arabia and its people witness a distinguished present, looking forward to a brighter future full of confidence under Custodian of the Two Holy Mosques King Salman Bin Abdulaziz Al Saud, who has been making, since the beginning of his reign, an effort to advance Saudi Arabia to further heights.