Ul Próżna, a short street leading off Plac Grzybowski, opposite the Teatr Żydowski (the Jewish Theatre), is an eerie and incongruous survivor of WWII. Its crumbling, unrestored redbrick façades, the ornamental stucco long since ripped away by bomb blasts, are still pockmarked with bullet and shrapnel scars. A few blocks to the south, in the courtyard of an apartment building at ul Sienna 55, stands one of the few surviving fragments of the redbrick wall that once surrounded the Warsaw Ghetto.