Rothschild – The French Revolution

The full extent of Prince William of Hesse’s wealth was perhaps never truly known. Yet, it was no secret that he had money to spare—more than half of Europe’s royal houses were in debt to him. His immense fortune made him a figure of great interest to both sides in the Napoleonic Wars, a position that greatly agitated the prince. He had no desire to openly support either of the embattled factions. To maintain an air of neutrality, he posted signs around the palace declaring Hesse a neutral nation. Still, he found himself torn—trapped between fear and greed.

Both the French and the anti-French coalition offered tempting incentives. The coalition wanted William to lease Hessian soldiers, as he had done in the past. Meanwhile, the French, advancing steadily through German territory, offered him a slice of Hanover in exchange for his allegiance.

Now in his fifties, Prince William appeared to be suffering from impaired judgment. He sold troops to Prussia while simultaneously pledging neutrality to Napoleon, seemingly under the illusion that such duplicity would go unnoticed. His advisors, however, were more realistic. Fearing an imminent French invasion, Mayer Rothschild and Karl Buderus urged the prince to move his fortune abroad by issuing loans, thereby protecting it from being seized by Napoleon.

But Prince William was growing distrustful of Mayer’s counsel. Rival financiers played on his prejudices, suggesting it was improper for a Christian prince to place his trust—and his wealth—in the hands of a Jewish banker. His own greed further clouded his judgment. Despite possessing more wealth than he could ever spend, the thought of losing even a single gold piece terrified him. He refused to issue more loans during such unstable times, fearing that war might prevent debtor nations from repaying him.

In 1806, Napoleon’s forces marched into Kassel and seized Wilhelmshöhe Palace. Prince William made a desperate, last-minute attempt to halt the invasion, but he failed. With little time to spare, he began hiding his vast wealth. Treasure chests were concealed in secret passages within the palace, while caskets of jewels and bills of exchange were sent to foreign ambassadors for safekeeping. Despite his efforts, much of his tangible fortune had to be left behind.

Disguised as an old woman, William fled Hesse. He couldn’t carry his antiques, rare coins, or sacks of gold and silver, and anything left behind was claimed by the French as spoils of war.

However, not all was lost. Left behind in Kassel was the astute Carl Buderus, who quickly struck a covert arrangement with the new French governor, General Lagrange. The general easily discovered many of the prince’s hidden caches, but Buderus pointed out that Napoleon had no way of knowing the actual value of the elector’s estate. With an understated appraisal, Lagrange could send a plausible report to Napoleon while pocketing part of the difference himself—provided he allowed the majority of the fortune to remain hidden and preserved for the exiled prince.

With this understanding in place, new hiding places had to be arranged for the prince’s chests of valuables—containing not just money, but important documents, ledgers, paintings, and precious metals. Every financier in Frankfurt who had worked with the elector was enlisted for the task.

Unlike others, Mayer Rothschild and Sons lacked a proper vault. In fact, a few years earlier, this oversight had led to a clerk embezzling tens of thousands of pounds. What they did have, however, was an unassuming shed behind the House of the Green Shield—once a children’s playhouse, now containing a heavy iron chest that opened onto a secret underground cellar. This hiding place, originally built to protect Jewish families during pogroms, now served a new purpose: safeguarding the wealth of the Elector of Hesse.

Rather than hiding gold or silver, Mayer Rothschild chose to protect something even more valuable—documents and ledgers. These records not only revealed the true extent of Prince William’s fortune, but also detailed the debts owed to him and the interest he had accrued. In wartime, such financial records were far more important than jewels; they represented the prince’s future income and economic influence.

With Prince William in exile, Buderus—now solely responsible for managing his finances—granted Mayer Rothschild the opportunity he had long dreamed of: he made Mayer the prince’s chief banker. It was a risky appointment, but it marked the beginning of Rothschild’s rise to international prominence.

Mayer’s task was formidable. He was to contact European princes indebted to William and recover the sums owed. In doing so, he positioned himself at the heart of European finance—an extraordinary opportunity that would never have emerged if the prince had not been forced into exile.