The British Royal family's wealth is estimated to be around £69 billion ($88 billion), as per Forbes. Their wealth stems from tangible assets such as properties, as well as the value of the family brand.

Among the valuable assets are the highly profitable Duchy of Cornwall and the Duchy of Lancaster estate, which includes land, property and other assets that belong directly to the Sovereign.

The esteemed Savoy Hotel and Somerset House are part of the Duchy of Lancaster estate, with net assets totalling approximately £652.8 million ($755.4m).

King Charles' personal fortune is estimated at £559.6 million ($772 million), making him the 258th richest person in the UK.

However, there is one Royal family whose net worth exceeds most, and is far greater than Elon Musk and Jeff Bezos combined.

The world's wealthiest Royal family is the House of Saud, the ruling Royal family of Saudi Arabia, with a staggering net worth of £1.1 trillion ($1.4 trillion).

In comparison, the world's richest man, , has a net worth of £313 billion ($396 billion), while Amazon founder Jeff Bezos is worth £190 billion ($240 billion).

The House of Saud's net worth is so vast compared to the British Royal family that it is estimated to be roughly 16 times that of King Charles's family.

The Saudi Arabian Royal family's staggering wealth, largely derived from vast oil reserves, affords them a luxurious lifestyle with grand palaces, private jets, extravagant yachts and a highly lucrative art collection.

This immense wealth is not uncommon among Royal families in the Middle East despite their limited authority under the Ottoman Empire.

However, following its collapse after World War I, these monarchies have seen their power and wealth grow exponentially. The valuable resources within the region, particularly in the Gulf monarchies, have contributed significantly to this wealth.

Consequently, Royal families from the United Arab Emirates (UAE), Oman, Bahrain, Qatar, Kuwait and Saudi Arabia lead lives most can only dream of. The Saudi Royal family comprises around 15,000 members, with the majority of wealth held by approximately 2000 relatives.

King Salman bin Abdulaziz Al Saud, who has been the head of the family since his reign began in 2015, is one such example. His most famous son and apparent heir, Mohammed bin Salman, also known as MBS, currently serves as the Prime Minister of Saudi Arabia and is widely regarded as the country's de facto ruler.

The Royal Saudis, with their immense wealth, have made several extravagant purchases over the years. These include properties scattered around the globe, such as France's Chateau Louis XIV, bought by MBS for a staggering £235 million, and Leonardo da Vinci's Salvator Mundi painting, purchased for £349.6 million.

MBS also splashed out on a £392 million yacht - mere pocket change considering their vast fortune.