VERKAUFSSTELLEN (Next Sales Premises), between two arrows pointing left and right, suggesting that large shopping developments were forthcoming in the immediate vicinity, although these never appeared. What was not apparent from the western side however, was that East Berlin's construction boasted its own illuminated display board facing east, whose messages comprised the version of the news that the Communist authorities in the east wanted their citizens to believe. In addition, the East Berlin sign was carefully placed so that, when viewed from further away down Leipziger Strasse, its display board obscured the West Berlin sign standing beyond it. Over the next two years, West Berlin would regularly raise or lower its sign to make it more easily visible from the East again – and then East Berlin would raise or lower its own construction to obscure it once more. Furthermore, the East German Government also exploited the huge facade of the nearby Columbushaus as a further propaganda tool. The 1953 uprising More significantly, living and working conditions in East Germany were rapidly worsening under Communist rule. Tensions finally reached breaking point and a Workers’ Uprising took place on 17 June 1953, to be quickly and brutally crushed when Soviet tanks rolled in, and some of the worst violence occurred around Potsdamer Platz, where several people were killed by the Volkspolizei. No one really knows how many people died during the uprising itself, or by the subsequent death sentences. There are 55 known victims, but other estimates state at least 125. West German estimates were much higher: in 1966 the West German Ministry for Inter-German Affairs claimed that 383 people died in the uprising, including 116 "functionaries of the SED regime", with an additional 106 executed under martial law or condemned to death, while 1,838 were injured and 5,100 arrested, 1,200 of these sentenced to a total of six thousand years in penal camps. It was also claimed that 17 or 18 Soviet soldiers were executed for refusing to shoot demonstrating workers, but this remains unconfirmed by post-1990 research. Whatever the casualty figures, for the second time in eight years, the "busiest and most famous square in Europe" had been transformed into a bloody battleground. Columbushaus, with its H.O. store on the ground floor and military police station above, had been a prime target in the insurrection and been burnt out yet again, along with the Haus Vaterland and other premises.