The Kleine Festung or “Little Fortress” was a prison in Theresienstadt and contained all the non-Jewish prisoners. Ironically, mail from the Kleine Festung received the Theresienstadt cancellation, by mail from the ghetto did not.

This postcard that was mailed from the Kleine Festung has a circular Theresienstadt cancel dated January 5, 1942. The third line in the return address indicates that the card is from the Kleine Festung.