{short description of image} MAZAL LIBRARY
* Hole 4
* Auschwitz Birkenau
Photo 20097a Crematorium 2 — Gas Chamber
  Legend:
A: Intact Steel Reinforcing Bar (Rebar) running East to West on the Roof of Krema II
B: Uncut Steel reinforcing Bar (Rebar) running North to South on the Roof of Krema II
C: Cut East/West Rebars to Form Hole #4