Fragments of human skeletons recently discovered in Warsaw are believed to have been buried at the time of the ghetto’s famous uprising.

Archaeologists uncovered the remains of two bodies after searching the basement of a former home on Swietojerska Street. A skull, arms and legs were found, and are currently under examination.

Other World War II-era artifacts have been found recently, including a sewing kit, a loaf of bread and a bowl of groats. The site of the former home, which is now part of a park, was near the Warsaw Ghetto but not incorporated.

Archives of the Jewish socialist party Bund were believed to be located in the basement, hidden there by party activist Marek Edelman. Researchers were eager to locate the archives, leading to the archaeology project.

The house itself was destroyed during the uprising.

The Warsaw Ghetto Uprising was a month-long rebellion led by thousands of Jews living within the notorious Warsaw Ghetto. On April 19, 1943, erev Pesach, the Jewish residents stood together with smuggled firearms and handmade grenades, in a last ditch effort to save the lives of their families.

Though ultimately unsuccessful—13,000 died in the uprising and the rest were deported to camps—it was a shocking feat to the Nazis that viewed the Jewish prisoners as largely defenseless.