© Getty Images

Ilham Aliyev - Estimated fortune: US$700 million.
The current president of Azerbaijan owns a vast patrimony, ie. an inherited estate. Despite earning the equivalent to US$228,000 per year, his private investments are worth much more.

© Getty Images

Ilham Aliyev - In 2010, the president's 11-year-old son became the owner of nine luxury mansions in south Dubai for about US$44 million, according to the Washington Post.

© Getty Images

Wen Jiabao - Estimated fortune: US$2.7 billion.
The former prime minister of China is another wealthy man on the list.

© Getty Images

Wen Jiabao - He ruled the country from 2003 to 2013 and has amassed a huge fortune, making him one of the richest men in the world.

© Getty Images

Hans-Adam II - Estimated fortune: US$6.2 billion.
The 77-year-old Lichtenstein prince is Europe's richest monarch.

© Getty Images

Hans-Adam II - He is the president of his family's bank, has several private investments, owns palaces and other real estate, and a 400-year-old art collection worth a fortune, according to the Express.

© Reuters

Kim Jong-un - Estimated fortune: US$5 billion.
The supreme leader of North Korea also owns a vast patrimony and a huge fortune.

© Reuters

Kim Jong-un - It is estimated that his fortune was inherited from his father and grandfather, and is now valued at US$5 billion, as the International Business Times points out.

© Getty Images

Dawood Ibrahim -

Estimated fortune: US$6.7 billion.
Ibrahim is perhaps one of the richest criminals in history. He founded the D-Company in Mumbai in the 1970s. By then his fortune was incalculable. He has several crimes on his resume, Interpol reports.

© Getty Images

Khalifa bin Zayed Al Nahyan - Estimated fortune: US$15 billion.
He is known as Sheikh Nahyan and is the current head of state of the United Arab Emirates (UAE) and emir of Abu Dhabi.

© Getty Images

Khalifa bin Zayed al Nahyan - The real value of his vast fortune and patrimony is unknown. He owns a luxury yacht valued at US$622 million, as reported by Thrillist.

© Reuters

Zine al Abidine Ben Ali - Estimated fortune: US$17 billion.
He was president of Tunisia between 1987 and 2011 and owns a large number of assets.

© Reuters

Zine al Abidine Ben Ali - Despite having stepped down from power due to the famous Jasmine Revolution, Zine Al Abidine Ben Ali still amassed billions of dollars.

© Reuters

Hassanal Bolkiah - Estimated Fortune: US$30 billion.
The sultan and absolute monarch of Brunei owns the largest private royal residence in the world, with a total of 1,788 rooms, according to The New York Times.

© Getty Images

Hassanal Bolkiah - The vast fortune is the result of sales and investments in the oil and gas sector.

© Getty Images

Bhumibol Adulyadej - Estimated fortune: US$30 billion.
The late Thai king ruled the country from 1946 to 2016, the year of his death.

© Getty Images

Bhumibol Adulyadej - He managed to amass a vast wealth during the 70 years of his reign. His son, Maha Vajiralongkorn, is the current king of Thailand.

© Getty Images

Isabel dos Santos - Estimated fortune: US$2 billion.
The businesswoman and eldest daughter of former President of Angola, José Eduardo dos Santos, was the richest woman in Africa as of 2013. She had a net worth of US$3.5 billion  

© Getty Images

Isabel dos Santos - However, Santos was accused of corruption in 2020, and assets worth more than a billion were frozen. It's believed that she still has a fortune of US$2 billion regardless. Her businesses are based in Angola and Portugal.

© Reuters

Ali Abdullah Saleh - Estimated fortune: US$30 to US$62 billion.
The late politician Ali Abdullah Saleh (1942-2017) was president of Yemen from 1978 to 1990.

© Reuters

Ali Abdullah Saleh - He allegedly enjoyed great wealth during his lifetime, even though his exact net worth wasn't officially known.

© Reuters

Hosni Mubarak - Estimated Fortune: US$70 billion.
He was president of Egypt from 1981 to 2011, after being overthrown during the Arab Spring.

© Reuters

Hosni Mubarak - Egypt's chief prosecutor has warned the United States and other world governments that former President Hosni Mubarak and his family may have money, gold, and other assets hidden, according to a Washington Post article.

© Reuters

Bashar al-Assad - Estimated fortune: US$122 billion.
Official sources say the Syrian ex-president has a fortune valued at US$1.5 billion.

© Reuters

Bashar al-Assad - Other sources reveal that he may have money hidden and that his fortune could exceed US$120 billion, as revealed in a LiveLeak article.

© Reuters

Muammar Gadaffi - Estimated fortune: US$200 billion.  
Before being overthrown and killed, it is estimated that the Libyan dictator was one of the richest men in the world.

© Getty Images

Muammar Gadaffi - The former leader, who died in 2011, is believed to have hidden his fortune in secret bank accounts. It's estimated that he had more than US$200 billion, including real estate and corporate investments around the world, according to the Los Angeles Times.

© Getty Images

Vladimir Putin - Estimated fortune: US$200 billion.
It is believed that the current president of Russia may be the richest man in the world, surpassing even Bill Gates and Jeff Bezos, according to CNBC.

© Getty Images

Vladimir Putin - Rumors regarding the real value of the Russian President's fortune have been around for some years. They resurfaced after the chief executive of an American investment fund, Bill Browder, claimed Putin could have more than US$200 billion. These statements were made to the Justice Committee of the United States Senate. This calculation, made by experts on the subject is, detailed by the Fortune website.

© Getty Images

Rothschild family - Estimated fortune: from US$400 billion
This Jewish family from Hamburg, Germany, established a banking dynasty in Europe and now owns a huge fortune, according to Celebrity Net Worth information.

© Getty Images

House of Saud -

Estimated fortune: US$1.4 trillion.
The house of Saudi Arabia has a total fortune estimated at US$1.4 trillion, according to information from House of Saud website. House of Saud controls an impressive amount of wealth and the oil business may be primarily responsible for these exorbitant amounts of money.

See also: According to a new report, millennials will be the richest generation in history

© Reuters