They immigrated to America from Germany in the nineteenth century. From tenements on the Lower East Side to Park Avenue mansions, this handful of Jewish families turned small businesses into imposing enterprises and amassed spectacular fortunes. But despite possessing breathtaking wealth that rivaled the Astors and Rockefellers, they were barred by the gentile establishment from the lofty realm of "the 400," a register of New York's most elite, because of their religion and humble backgrounds. In response, they created their own elite "100," a privileged society as opulent and exclusive as the one that had refused them entry.