Spandau Prison became a sort of predecessor of the Nazi concentration camps. While it was formally operated by the Prussian Ministry of Justice, the Gestapo tortured and abused its inmates, as Egon Erwin Kisch recalls in his memories of Spandau Prison. By the end of 1933 the first Nazi concentration camps had been erected (at Dachau, Osthofen, Oranienburg, Sonnenburg, Lichtenburg and the marshland camps around Esterwegen); all remaining prisoners who had been held in so-called protective custody in state prisons were transferred to these concentration camps.