Jacob Mayer Rothschild, the youngest son of
Mayer Amschel Rothschild, settled in Paris in 1812 where his name Jacob was translated to James. In 1817, he formally created the bank , whose partners were himself and his brothers
Amschel of
Frankfurt,
Carl of
Naples,
Nathan of London and
Salomon of
Vienna. In 1822 the five brothers were awarded the hereditary title of
Baron by
Emperor Francis I of Austria, after which James used the nobility particle "de" before his name, and the bank was subsequently known formally as . The Banque Rothschild was very active in lending to governments. Following the
independence of Belgium, it financed
Leopold I of Belgium. Following the
July Revolution of 1830 that saw
Louis-Philippe come to power in France, James de Rothschild put together the loan package to stabilize the finances of the new government and a second loan in 1834. In recognition of his services to the nation, King Louis-Philippe elevated James to a Grand Officer of the
Legion of Honor. Following the
Franco-Prussian War, in 1871–1872 the bank put together a syndicate that raised the five billion francs the country was obliged to pay
Prussia under the terms of
Armistice of Versailles. The Banque Rothschild then expanded its investment banking activities. In partnership with
N M Rothschild & Sons of England, it owned the
Chemin de Fer du Nord railway in France that ran from their major hub, the
Gare du Nord in Paris, to the
English Channel and Belgium. By the later part of the 19th century, the bank was heavily involved in
oil exploration in the Baku area of present-day Azerbaijan through their company, the
Caspian and Black Sea Oil Industry and Trade Society established in 1883, an investment that proved to be highly lucrative. In 1898, the Rothschilds established the Mazut Transportation Society that developed a fleet of oil tankers operating in the
Caspian Sea. In 1911, the
Royal Dutch Shell company purchased the Rothschilds' Azerbaijan oil fields. In 1873 de Rothschild Frères in France and
N M Rothschild & Sons of London joined with other investors to acquire the Spanish government's money-losing
Rio Tinto copper mines. The new owners restructured the company and turned it into a profitable business. By 1905, the Rothschild interest in Rio Tinto amounted to more than 30 percent. In 1887, the French and English Rothschild banking houses lent money to, and invested in, the
De Beers diamond mines in South Africa, becoming its largest shareholders. In the 1930s, however, the bank's vast railroad holdings were
nationalized. The bank's growth was spectacular and near-continuous. According to the bank's records, in 1815 the capital of the Paris banking house James Mayer de Rothschild founded amounted to £55,000 (equivalent to £ million in ); by 1852 the figure was £3,541,700 (equivalent to £ million in ), and in 1878, just ten years after his death, £16,914,000 (equivalent to £ billion in ). After James, the Banque Rothschild was run by his sons
Alphonse (d. 1905),
Gustave (d. 1911) then
Edmond (d. 1934) together with Alphonse 's son
Edouard. It was returned to the Rothschild family following the
Liberation of France. In 1949,
Guy de Rothschild took over the bank's leadership following Edouard de Rothschild's death. ==Nationalization and aftermath==