The legendary names include Rothschild, Mendelssohn, Bloch-Bauer{u2014}distinguished bankers, industrialists, diplomats, and art collectors. Their diverse taste ranged from manuscripts and musical instrushy;ments to paintings by Old Masters and the avant-garde. But their stigma as Jews in Nazi Germany and occupied Europe doomed them to exile or death in Hitler{u2019}s concentration camps. Here, after years of meticulous research, Melissa M�uller...