In 1861 Garibaldi's Red Shirts stormed southern Italy. What had been the Kingdom of the Two Sicilies became part of unified Italy. The Rothschild bank at Naples closed its portals because there was no longer a Neapolitan monarch to loan to. Adolph, son of the founder, Carl, did not care to do business with lesser principals and followed the royal family into France. A nice difference obtained between the two expatriates. In Paris the king became an ex-king, but Rothschild was not an ex-Rothschild.
His exile proved no less noble than his former native household. The Empress of Austria (who became so intimate with his wife Julie) was only one of many illustrious guests in his several residences.
But Adolph had no children. His brother Wilhelm had three; brother Mayer, seven. All ten were---supreme frustration---girls. In this unrelieved femininity lay the demise of the Italian branch and, as a matter of fact, of the German as well.