After the prosperity of the 1920s and the economic downturn of the 1930s, World War II brought enormous change to the lives of the super-rich. For some, that meant allowing their stately homes to be used for the war effort, while for others giving up valuable family heirlooms was a small price to pay for safety. Read on to find out how some of the world's richest people lived between 1939 and 1945.

You’d be forgiven for thinking that the British royals lived like, well, royalty during the war. King George VI, who reigned between 1936-1952, may have lived between Buckingham Palace and Windsor Castle – yet he and his family still had to ration everything from food to bath water. Pictured here are the Duke and Duchess of Beaufort (far left and center right) with Princess Elizabeth (center left), who we now know as Queen Elizabeth II, and her sister Princess Margaret (far right).

The royals experienced the same dangers as the rest of the population. In fact, Buckingham Palace was bombed nine times during the war, and twice within three days in September 1940. During the second of these September attacks the King and Queen were actually in the Palace, but managed to escape unharmed. During the war years King George VI (pictured right) struck up a close – if unlikely – friendship with Winston Churchill, the British Prime Minister. They got on so well that the weekly audience between King and Prime Minister soon became informal Tuesday lunches with no staff present. Although sometimes they were interrupted by air raids.

Meanwhile, the Duke and Duchess of Beaufort had to give up most of their home to King George VI's mother, Queen Mary, who was the Duchess' aunt. She is pictured here in her youth in 1905. Allegedly, she arrived carrying more than 70 pieces of luggage and had 50 members of staff in tow, taking over all but two bedrooms and a sitting room, which were left for the Duke and Duchess.

Louis and Edwina Mountbatten, the 1st Earl Mountbatten and Countess Mountbatten of Burma, were something of an ‘It’ couple before the war. Louis had royal lineage while Edwina had inherited a fortune when her grandfather Sir Ernest Joseph Cassel died in 1921 – a huge £2 million, equivalent to $117 million in today’s money. Along with that, she received his townhouse, Brook House, and was a leading member of London society.

But all that quickly changed with the outbreak of World War II. Louis went off to serve for the British Navy, becoming Supreme Allied Commander for the South East Asia Command from 1943 to 1946. Meanwhile, Edwina worked extensively in aid, serving with the St John Ambulance Brigade (pictured, seated on the far right) and later helping prisoners of war in southeast Asia.

Edwina also had a bit of a reputation. She was known as one of the most beautiful women in the country and was unflatteringly described in her daughter’s memoir as a “man eater”. She had many affairs, the most famous of which was with Indian Prime Minister Jawaharlal Nehru. Edwina met him after the war when the couple moved to India in 1947 so that Louis could fulfill his role as the last Viceroy of India, helping to oversee India’s transition to independence.

Nancy and Waldorf Astor, both American expats living in the UK, got married in 1906. They were gifted the Astor family estate, Cliveden House in Buckinghamshire, which Waldorf’s father William had bought in 1893 for $1.2 million – equivalent to $34 million today. The ‘Cliveden Set’ was the name given to the social group that grew around them, with the house becoming something of a social hub where everyone from Charlie Chaplin to Mahatma Gandhi came to visit.

Nancy Astor was Britain’s first female MP to take her seat, serving in Parliament between 1919 and 1945. As a member of the Unionist Party (now the Conservative Party), she gained a reputation for being an outspoken rule-breaker. Both Nancy and Waldorf were against the war, and their Cliveden Set was known for supporting appeasement with Hitler. This led them to often be accused of being fascists, although they denied this. Nancy changed her opinion on the war when the Germans invaded Prague, and despite their reservations they supported local people in her Plymouth constituency during bombings. Nancy stepped down from the Conservative Party in 1945, as a result of her increasingly erratic behavior in Parliament.

As for Cliveden? At the outbreak of the war in September 1939, part of the enormous estate was rented out for a shilling a year to the Canadian Red Cross, who had also used it during World War I. The Canadian Red Cross Memorial Hospital was built on the estate's vast grounds, remaining open after the war under the newly-formed National Health Service (NHS).

On the other side of the world, at the seat of the British Empire in India, the Nizam was living the high life. Osman Ali Khan ruled the southern Indian state of Hyderabad between 1911 and 1948, before it was taken over by India. His life was characterized by wealth and excess, with a personal net worth estimated at $2 billion in the 1940s – equivalent to roughly $34.9 billion today.

The Nizam had the famous Golconda mines to thank for his affluence, which helped to make Hyderabad state the only global supplier of diamonds. His wealth was legendary: making an appearance on the cover of Time magazine in 1937, he was labeled the richest man in the world, and he owned an impressive diamond collection including the 185-carat Jacob Diamond, ranked as the fifth largest in the world. During World War II he provided military support to the Allies, lending naval ships and two Royal Air Force squadrons. When the war ended he was awarded the Royal Victorian Chain for his aid. He is pictured here bowing to King George V and Queen Mary in 1911 when they visited the Delhi Durbar, held to celebrate their coronation.

As one of the wealthiest and most influential families in North America in the last 200 years, headed up by patriarch John D. Rockefeller I (pictured), the Rockefellers played an integral role in the war. They weren’t keen on becoming involved in the European conflict initially, given that they had business dealings with German firms such as IG Farben and close ties with Britain and France. Yet they did want a war with Japan, one of their main rivals for oil and rubber resources in southeast Asia. 

Nelson A. Rockefeller, grandson of John D. Rockefeller I, was head of US activities in Latin America, helping to improve its relations with the West and counter the rising Nazi influence. David Rockefeller, Nelson's younger brother, enlisted in the army in 1943, while also assisting with military intelligence in North Africa and France. Pictured is Nelson and David's eldest brother John D. Rockefeller III (left) at Claridge’s in London in 1946, as he pledged to give away $10 million to fund postwar Europe.

The Rockefellers also had an interesting link with the UK wartime Prime Minister. Searching for a biographer to chronicle their family heritage in the 1930s, they approached Winston Churchill, who was well-known for his writing talent and penned 42 books in his lifetime. Yet Churchill’s request of $250,000 for the task – equivalent to around $4.7 million today – was too steep, so they ultimately got a Columbia University historian to do it instead. 

Like many other powerful American dynasties, the Morgan family had business ties with Germany. Through General Electric, they controlled a large proportion of the German radio and electric industry via AEG and Siemens. What’s more, they had a 30% stake in aircraft manufacturer ‘Focke-Wulf’. American cooperation with the Germans was prevalent up until 1941, with large German banks being under the control of American financial capital.

Junius Spencer Morgan II and Henry S. Morgan (pictured), grandsons of J. P. Morgan Sr., were both enlisted in the army, working at the intelligence unit Office of Strategic Services (OSS). The financial difficulties of the war were the final death knell for the Jekyll Island Club, the so-called ‘Millionaire’s Club’ which had been slowly declining throughout the 1930s, and of which the Morgans were pivotal members.

As for their elaborate homes? The Morgans’ impressive New York 45-room brownstone on Madison Avenue (pictured), which was rebuilt in 1928, was inhabited by the family up until the death of Jack Morgan in 1943. It was then sold to the Lutheran Church in America to serve as its headquarters.

The prolific industrialist Henry Ford was a pacifist, so initially opposed US involvement in World War II. Yet when the Japanese bombed Pearl Harbor, he changed tack, building a new factory in Detroit in 1941 to produce military aircraft. Completed in 1942, the Willow Run factory (pictured) was the largest in the world, with 42,000 workers completing a bomber nearly every hour – utilizing Ford’s famous production line, of course.

Yet Ford’s support of the US was problematic. In 1939, he was still doing business with Nazi Germany, which included manufacturing weapons and military equipment. What’s more, Ford-Werke, the German branch of the company, started hiring French prisoners of war to work as slave laborers in 1940, although this halted when the US entered the war a year later.

Edsel Ford (pictured right), Henry and his wife Clara’s only child, was president of the Ford Motor Company between 1919 and 1943. Managing the Willow Run factory, it’s been alleged that the immense pressure of the job led to his ill health, with Edsel developing stomach cancer and passing away in 1943. His son Henry Ford II (pictured left) was serving in the Navy at this time and so didn't take up the role of president of the Ford Motor Company until 1945. 

J. Paul Getty was known for founding the Getty Oil Company and was named the richest living American in 1957 by Fortune, with a net worth estimated at $1.2 billion – which is $11 billion in today’s money. During the Great Depression of the 1930s, Getty had shrewdly snapped up companies, which helped him to amass this fortune. During the war years, he put his time into an airplane factory in Oklahoma. 

As well as his reputation for infidelity and extreme stinginess, documents released in 2003 suggest the business magnate had another dark side. He was linked to a shadowy bunch of bankers, who helped to supply the Nazis with fuel in the early years of the war, as well as a fraudster named Serge Rubinstein who helped run his business in London. He was also said to have been involved in a deal supplying Mexican oil to Germany during the war.

During the war, Getty was married to singer Louise Dudley Theodora Lynch, known by the nickname Teddy. Yet the couple quickly drifted apart after their marriage in 1939, with Teddy studying in Italy and Getty working obsessively. Teddy was briefly put behind bars while in Italy, after being found by Mussolini’s fascists and accused of being a spy. Getty also had a change of heart about the war after the bombing of Pearl Harbor.

The Rothschilds were a Jewish banking family, whose business was founded by Amschel Mayer Rothschild (pictured) in the 1760s. The family had branches in Vienna, Naples, France and England. Philippe de Rothschild, a prominent member of the French branch, was called up to serve in the French Air Force. Yet he was arrested in Algeria, and his citizenship revoked in September 1940, reportedly because he had left France without official permission. He left France for England. When he returned after the war he discovered that, tragically, his estranged wife Élisabeth Pelletier de Chambure had been sent to a concentration camp, where she died in 1945. 

As for the Austrian branch of the family, they had a large collection of art, jewelry and antiques stolen by the Nazis in 1938, when the Third Reich annexed Austria. The items were kept to the west of Vienna, away from military zones, until after the war, when the family begun a lengthy quest to get them back. In the 1990s, after nearly five decades of bargaining with the Austrian government, the items were finally returned.

Over in the UK, Anthony de Rothschild and his wife Yvonne (pictured with her children) had noticed tensions in Europe as early as the 1930s. In fall 1933, Yvonne became president of a society which aimed to help German Jewish women and children, while in 1938 Anthony became chair of the Emigration Committee of the Council of the German Jewry. Anthony’s private letters reveal his involvement in helping Jewish refugees with resettlement during the war.

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