(FILES) A picture taken on April 8, 2013 shows a memory plaque stuck into a pile of pebbles on the barbed wired premisses of the KZ Auschwitz-Birkenau concentration camp, in Oswiecim, Poland to commemorate the six million Jews killed during the Holocaust. The Federation of Czech Jewish communities strongly opposes the possible visit of Russia's President Vladimir Putin in Prague in January 2015 for ceremonies of the 70th anniversary of the liberation of the Nazi Auschwitz concentration camp, it said on December 20, 2014 in Prague. AFP PHOTO/JANEK SKARZYNSKI