To walk into “The Sassoons” at the Jewish Museum is to time travel to an age when Jews from Baghdad traded opium at Beijing and bolts of cotton from Mumbai. At its heart is a family that mixed religious awe and fabulous wealth, abundance alchemized into art. They journeyed from the Tigris to the Thames, and went from servants of pashas to intimates of kings. They married Rothschilds and wrote immortal verse before fading away. Here, they shine.