King Abdullah bin Abdulaziz Al Saud has an estimated net worth of $17 billion. On Friday, it was announced that the King of Saudi Arabia is currently battling pneumonia and reportedly needed temporary help from a breathing tube. According to the royal court, the king's condition is now stable.

King Abdullah bin Abdulaziz Al Saud, known as the Custodian of the Two Holy Mosques who has a multibillion net worth, has ascended to the throne of being the King of Saudi Arabia upon the death of his half-brother, King Fahd. In 2014, Forbes ranked King Abdullah as the 11^th most powerful people in the world.

Also the Prime Minister of the Council of Ministers and Commander of the National Guard, King Abdullah bin Abdulaziz Al Saud developed a deep respect for religion, history and the Arab heritage. According to The Richest, King Abdullah's source of wealth was mainly because of oil that contributed to his $17 billion net worth.

In 2012, King Abdullah bin Abdulaziz Al Saud named his half-brother, Prince Salman, his heir apparent after the death of Crown Prince Nayef bin Adbulaziz. Earlier this year, he also appointed Prince Muqrin bin Abdulaziz as deputy crown prince, giving some assurance on Saudi Arabia's long-term succession process.

Through the global recession, King Abdullah who has a remarkable multibillion net worth successfully led Saudi Arabia with government spending and high oil production. As the ultimate monarch of the desert kingdom, he has supervised the security of Islam's holiest cities and controlled 20 percent of the world's best known oil reserves.

In an announcement made by the official Saudi Press Agency, the royal court said 90-year-old King Abdullah had been diagnosed with a lung infection after he was admitted to King Abdulaziz Medical City Hospital in Riyadh on Wednesday. The New York Times reported the king was then transferred to a military hospital on Thursday.

"It became apparent that there was a lung infection that required the insertion of a tube to aid with breathing on a temporary basis this evening," the royal court said in a statement on Friday, Al Jazeera reported.

Based on the reports, the combination of the king's age and his latest illness created doubts over his health. The king's health difficulties also come as Saudi Arabia exerted itself more forcibly in the conflicts in Syria and Iraq. Saudi Arabia is also actively participating in the US-led coalition airstrikes campaign against the Islamic State and other extremist groups involved in those conflicts.

In the past few years, King Abdullah bin Abdulaziz Al Saud who has an estimated $17 billion fortune as listed by Celebrity Net Worth, has undergone surgery related to a herniated disc.