Dachau was the first concentration camp established and was opened on March 22, 1933. The camp's first inmates were primarily political prisoners (Communists or Social Democrats), habitual criminals, homosexuals, Jehovah's Witnesses, and anti-socials (beggars, vagrants, hawkers). Others considered problematic by the Nazis were also included (Jewish writers and journalists, lawyers, unpopular industrialists, and political officials).