(FILES) In this file photo taken on April 28, 2015 a visitor walks through the main gate of the former Nazi concentration camp Mauthausen, northern Austria. Plans to build a business park on the site of a former Nazi concentration camp have drawn outrage in Austria, with the Mauthausen Memorial calling for the site's preservation. Austrian media revealed this week that the real estate company of Andreas Ramharter, the mayor of Leobersdorf town in Lower Austria, sold a plot of land which houses the remnants of former labour camp barracks. Around 400 women, mainly Russian, Italian and Polish, were forced to manufacture infantry munitions between September 1944 and April 1945 at the Hirtenberg site, an annex of the Mauthausen concentration camp complex. (Photo by Joe KLAMAR / AFP) (Photo by JOE KLAMAR/AFP via Getty Images)