Damage to Majdanek

AP reports that a fire burnt down half of one of the barracks buildings at Majdanek last night. Majdanek was one of six Vernichtungslager or "extermination camps" that the Nazis constructed in 1941. At this point, the cause of the fire is still under investigation, with the likely culprit a recent power outage. The most upsetting result of the fire was the loss of approximately 10,000 pairs of shoes belonging to former victims.
Earlier this year, flooding threatened Auschwitz-Birkenau as well. I suppose it's inevitable that these strucutures ultimately succumb to the elements. I wonder how long museums to Auschwitz and other death camps will stick around? Will they have the longevity of sites like the Dome of the Rock or Trajan's Column? Will future generations still want or need them around?

Above is the memorial to the victims of Majdanek. It also houses the ashes of the dead.