Between 1939 and 1944 over 84 percent of Warsaw was completely destroyed, with the city centre bearing the brunt of the damage. In spite of the Herculean rebuilding work that has since taken place, bullet scarred walls on pre-war tenements can still be found in relative abundance round the few parts of the centre that escaped total destruction. Perhaps most obvious of all is the building on ul. Waliców, featuring shell-pocked facades and a wall half-tumbling down.