Guillaume, Hereditary Grand Duke of Luxembourg (3dR) and his wife Countess Stephanie de Lannoy (4thR) arrive with Piotr Cywinski (R), director of the Auschwitz-Birkenau museum, walk by a fence during ceremonies for the 70th anniversary of the liberation of the Nazi death camp Auschwitz-Birkenau 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