Through their collaborative efforts, the Rothschilds rose to prominence in a variety of banking endeavors including loans, government bonds, and trading in bullion.
Their financing afforded investment opportunities and during the 19th century, they became major stakeholders in large-scale mining and rail transport ventures that were fundamental to the rapidly expanding industrial economies of Europe.
As a result of Carl's success, the Rothschilds had a substantial banking presence in England and three other major European capitals, giving the family considerable influence and an advantage over their competitors.
In 1829, he was appointed consul-general of Sicily at Frankfurt and in January 1832 the Jewish banker was given a ribbon and star of the Sacred Military Constantinian Order of Saint George at a ceremony with the new Pope, Gregory XVI.
Because of the family's close political connections with Austria and France, Adolphe Carl von Rothschild [fr] was caught in a delicate position.
Because the Naples branch was run by just two family members, father Carl Mayer von Rothschild, and son Adolphe, the only great property they occupied there was the Villa Pignatelli at Riviera di Chiaia with a spectacular view of Mount Vesuvius, acquired in 1841.