ZUM GEDENKEN AN
ERNST KIRCHWEGER
12.1.1898 – 2.4.1965
ER WURDE DAS ERSTE OPFER RECHTSEXTREMER GEWALT IN DER ZWEITEN REPUBLIK .

ER WURDE AM 31.3.1965 BEI EINER DEMONSTRATION GEGEN DEN NAZIPROFESSOR TARAS BORODAJKEWYCZ VON EINEM RECHTEN BURSCHENSCHAFTER NIEDERGESCHLAGEN UND STARB ZWEI TAGE SPÄTER .

Part of the "Stolpersteine" (stumbling blocks) project, set up by the German artist Gunter Demnig, who commemorates the victims of the Nazis. The ccovers are usually placed in front of the houses of the victims.

This cover differs from the others in that it talks about events that happened after World War II.
More details can be found here Click for the item in The ultimate street signs site

Translation of the text on the cover:
IN MEMORY OF
ERNST KIRCHWEGER
1/12/1898 – 4/2/1965
HE BECAME THE FIRST VICTIM OF RIGHT-WING VIOLENCE IN THE SECOND REPUBLIC.

ON MARCH 31, 1965 DURING A DEMONSTRATION AGAINST THE NAZI PROFESSOR TARAS BORODAJKEWYCZ, HE WAS BEATED DOWN BY A RIGHT-WING ACTIVIST AND DIED TWO DAYS LATER.