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The British royal family has anestimated net worth of $88 billion, according to business consultancy firmBrand Finance. Still, that monarchy is far from being the richest royal family in the world.

That distinction likely goes to the House of Saud, the ruling royal family of Saudi Arabia. Comprising15,000 family members (although a majority of the wealth is only held by about2,000 of them), the House of Saud is estimated to beworth $1.4 trillion. For reference, that's nearly 16 times the British royal family's net worth.

Much like their British counterparts, the members of the Saudi royal family are notoriously private about their fortune. But what is known, suggests anenvious lifestyle filled with big spending, private jets, luxury yachts, top of the line helicopters,sprawling chateaus and apalatial estate decked out with gold furniture — including agold-plated Kleenex dispenser.

However, members of the family alsoprovide money to those in need through charitable organizations andinvest in the Saudi people. More recently, the countrypledged millions to a World Bank fund for female entrepreneurs.

Their riches stem from the vast oil reserves uncovered more than 75 years ago, under the reign of King Abdulaziz ibn Saud. The country's state-owned natural gas and petroleum company Saudi Aramco is valued by some at more than $2 trillion. If that estimation is correct, it would be one of the world's mostprofitable oil companies.

One of the most influential members of the royal family isKing Salman of Saudi Arabia, who succeeded his late brother Abdullah bin Abdulaziz Al Saud in 2015. Reportedlyworth $17 billion, the 82-year-old has handed overmuch of the country's leadership to his son and heir to the throne Crown Prince Mohammed Bin Salman, 32.

In an effort to clamp down oncorruption last year, the crown prince forced the country's richest people toturn over their fortunes to the state, including many ofhis own relatives. As a result, Forbes dropped ten Saudis from its annual list of the world's billionaires.

The country claims to haverecouped more than $100 billion through this "corruption campaign," but that figure is impossible to verify.

According to theNew York Times, the heir recently purchased a a $450 million Da Vinci painting, a $500 million yacht and a $300 million French chateau. He reportedly also owns two homes in London and a compound on Spain's southern coast.

In an interview withCBS News, the Crown Prince said that hisfinances were a private matter and that he did not need to apologize for an opulent lifestyle. "I'm a rich person and not a poor person. I'm not Gandhi or [Nelson] Mandela," he said. "I'm a member of the ruling family that existed for hundreds of years before the founding of Saudi Arabia."

He also claimed that a large share of his wealth goes toward charity. "I spend at least 51 percent on people and 49 on myself," said the prince.

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