Documents, photographs, witness statements, films and all sources systematically collected by Porta Polonica are digitized and recorded in a database.
Polish House in Bochum (Dom Polski) at the former Klosterstraße 6, today Am Kortländer 6
Until 1939 office of the III. district of the Union of Poles (Westphalia), after 1945 until today headquarters of the organisation, photograph, ca. 1925