Musica non grata is a project aimed at rediscovering works by composers persecuted by the National Socialists. On Saturday 23 April, at 7:00 PM, Tomáš Brauner will conduct the National Theatre Orchestra at the National Theatre’s historic building, performing a Czech premiere of Symphony No. 21 “Kaddish” by Mieczysław Weinberg as a part of the project. The soprano Marie Fajtová will sing the solo part and the evening will be opened by Maciej Ruczaj, the director of the Polish Institute in Prague, speaking on the context of creation of the work.