Wikipedia
konkret has been the name of two German magazines.
konkret was originally the name of a magazine established by Klaus Rainer Röhl in 1957, that was an influential magazine on the German political left in the 1960s. The magazine was dissolved in 1973 as a consequence of Röhl's rejection of the leftist terrorism in Germany (in which his former wife Ulrike Meinhof took active part).
Since 1974, Hermann L. Gremliza has published a monthly magazine with the same name, self-described as a "magazine for politics and culture". The current magazine is significantly less influential than the original konkret magazine and part of the far-left fringe. It is described as leftist extremist by the Federal Office for Protection of the Constitution and also as Anti-German by the State Office for Protection of the Constitution in North Rhine-Westphalia.