From the Nazi seizure of power onward, these composers found it increasingly difficult, and often impossible, to get work or have their music performed. Many went into exile (e.g., Arnold Schoenberg, Kurt Weill, Paul Hindemith, Berthold Goldschmidt); or retreated into "internal exile" (e.g., Karl Amadeus Hartmann, Boris Blacher); or ended up in the concentration camps (e.g., Viktor Ullmann, or Erwin Schulhoff).