That exhibition is still open until January 11, 2015 at The House Of Photography in Hamburg and I can just highly recommend it. Among the artists whose work is shown are Alexander Rodchenko, Henri Cartier-Bresson, Robert Capa, Christer Strömholm, Robert Frank, Bruce Davidson, William Klein, William Eggleston, René Burri, Thomas Höpker and Bruce Gilden.
If you ever have the chance to visit Hamburg then step by at the Deichtorhallen location – they always have excellent exhibitions!