S M von Rothschild was a banking enterprise established in 1820 in Vienna, Austria-Hungary by Salomon Mayer Rothschild, the founder of the Rothschild banking family of Austria and a member of the Mayer Amschel Rothschild family of Frankfurt, Germany. The business prospered, financing various Austrian government undertakings where large amounts of capital had to be raised. The bank played a major role in the building of the country's economic infrastructure including the first rail transport networks. Passed down to Salomon Mayer Rothschild's male heirs, the bank would be run by Anselm von Rothschild (President: 1848–1874), Albert Salomon von Rothschild (President: 1874–1911), and Louis Nathaniel von Rothschild (President: 1911-1939).