In pictures: Auschwitz-Birkenau, then and now. A new publication by the Auschwitz-Birkenau State Museum in Poland shows photographs taken in the extermination camp during World War II alongside pictures of the same locations today. More than a million people - most of them Jewish - were murdered by the Nazis at Auschwitz-Birkenau during World War II.
The horrible gas chambers at Auschwitz. Used for the first time in 1941. It fit 700 people and took 2 days to burn the bodies..this wasn't fast enough, so they built another camp, Birkenau (Auschwitz II) that can handle 4000 at a time.