On Friday, the Emirate of Abu Dhabi and President of the United Arab Emirates, Khalifa Bin Zayed al Nahyan, confirmed his death at the age of 73. Although the reason for his death remained unknown, he had been suffering from health issues for some years, according to WAM, the official news agency, which quoted the authorities: The Ministry of Presidential Affairs expressed its condolences to the people of the United Arab Emirates and Muslim Arab countries on the loss of the country’s leader, who died on Friday, May 13.

Sheikh Khalifa, as he was called, became president of the United Arab Emirates in 2004, succeeding his father, Sheikh Zayed Bin Sultan Al Nahayan, who was the country’s founding father. He had a stroke a decade later, in 2014. He hasn’t been the same since then, and despite his assurances that the operation was successful, public appearances have become increasingly rare.

With his passing on Friday, the government declared an official state of mourning and half-staff flags for 40 days, with public and private sector work suspended for the first three.

The situation shifted at one point when loss filled the streets of the United Arab Emirates. The flags were lowered at half-staff, and national television networks focused only on the president’s remarkable career. According to worldwide media accounts, the news broke at 3:00 p.m. on Friday, a day dedicated to Muslim prayers, and quiet prevailed in the areas.

He was named one of the wealthiest monarchs in the world by Forbes magazine, with oil reserves estimated at 97.8 billion barrels and the world’s second-biggest sovereign wealth fund. The Burj Khalifa is a project that has really commemorated this great man. Originally known as Burj Dubai, after the world’s tallest and probably most renowned structure, it was renamed Burj Khalifa in 2009 given the financial assistance is provided to a debt-ridden Dubai during the financial crisis.

Sheikh Khalifa was appointed heir apparent in 1969 after graduating from the UK’s Sandhurst Military Academy. He became Prime Minister of Abu Dhabi and subsequently Deputy Prime Minister of the Federation two years later.

He was married to a relative, Sheikha Shamsa Bint Suhail al Mazrouei, and had two kids, Mohamed and Sultan, according to what is known about his personal life.

Since his stroke in 2014, his half-brother Mohamed Bin Zayed, Crown Prince of Abu Dhabi, often known as “MBZ,” has been in charge of the country’s affairs and is widely regarded as the oil monarchy’s de facto ruler. Sheikh Mohamed Bin Rashid, the Prime Minister of the United Arab Emirates and the Emir of Dubai, will serve as interim president until the Federal Council elects a new president within 30 days. The chosen one is likely to be Mohamed Bin Zayed’s younger brother.