On Tuesday night, @boulezsaal hosted a special concert benefiting @unofluechtlingshilfe, the German partner organization of UNHCR. Led by Michael Barenboim, members of the @divanorchestra performed works by Webern and Mozart, before being joined by Daniel Barenboim, in an unannounced surprise appearance, for Schumann's Piano Quintet. Photo Credit: Peter Adamik