The Rothschilds had entered upon their spectacular career as the financial servants of the Kurfürst of Hessen, one of the outstanding moneylenders of his time, who taught them business practice and provided them with many of their customers. Their great advantage was that they lived in Frankfurt, the only great urban center from which Jews had never been expelled and where they formed nearly 10 per cent of the city’s population at the beginning of the nineteenth century.
