Arbeit macht frei
http://www.google.com/search?q=Work+Makes+Free&hl=en&client=firefox-a&hs=jlw&sa=G&rls=org.mozilla:en-US:official&channel=s&biw=1195&bih=831&prmd=ivns&tbm=isch&tbo=u&source=univ&ei=dj_6TYuzMIK4sAPSgqDeBQ&ved=0CC4QsAQ
Indeed.