Guillaume, Hereditary Grand Duke of Luxembourg (C-R) and his wife Countess Stephanie de Lannoy (C-L) lay down a wreath on a plaque for the Luxembourgian vicitims who died in the Nazi concentration camp in Auschwitz at the Auschwitz-Birkenau memorial site on January 27, 2015 in Oswiecim, Poland. Seventy years after the liberation of Auschwitz, ageing survivors and dignitaries gather at the site synonymous with the Holocaust to honour victims and sound the alarm over a fresh wave of anti-Semitism.     AFP PHOTO / JANEK SKARZYNSKI        (Photo credit should read JANEK SKARZYNSKI/AFP/Getty Images)