This rare portrait of Bach, by Elias Gottlob Haussmann, hung in John Eliot Gardiner's home during World War II. courtesy of William H. Scheide, Princeton, N.J. hide caption

itoggle caption courtesy of William H. Scheide, Princeton, N.J.

John Eliot Gardiner leads the Orchestre Revolutionnaire et Romantique and the Monteverdi Choir at Carnegie Hall in New York, NY on November 17, 2012. Melanie Burford for NPR hide caption

itoggle caption Melanie Burford for NPR