Auschwitz II – Birkenau: The Largest Extermination Camp of WWII

May 6, 2021

Explore Auschwitz II – Birkenau, the largest Nazi extermination camp. Learn about its history, camp structure, and its role in the Holocaust.
Auschwitz II – Birkenau: The Largest Extermination Camp of WWII
May 6, 2021

The Scale and Significance of Auschwitz II–Birkenau

The Auschwitz II – Birkenau subcamp was established as part of the Nazi concentration and extermination complex near Oświęcim. Built in 1941, it became the largest Nazi death camp, where over a million people perished, primarily Jews, as part of the Final Solution. Today, the site remains a symbol of the Holocaust and a place of remembrance.

Origins of Auschwitz II – Birkenau

The first plans for Auschwitz II – Birkenau emerged in spring 1941, following a visit by Heinrich Himmler to Auschwitz I. The new camp was built in Brzezinka (Birkenau), about 3 km from Auschwitz I, originally intended for Soviet prisoners of war.

Construction began in October 1941, with prisoners forced to work in inhumane conditions. The site was chosen due to its secluded, marshy terrain, which facilitated Nazi secrecy and mass extermination. Local residents were displaced, and the area was incorporated into the so-called interest zone of the Auschwitz camp.

👉 Read more about the origins of the Auschwitz-Birkenau complex:
History of Auschwitz-Birkenau Camp

Death Gate and guard tower at Auschwitz II - Birkenau
Death Gate and guard tower at Auschwitz II - Birkenau

Location and Camp Conditions

Auschwitz II – Birkenau was constructed on 140 hectares, surrounded by barbed-wire fences and guard towers. Prisoners were initially forced to build drainage canals, then brick barracks, watchtowers, and fences.

By 1944, the camp had over 300 buildings, mostly wooden barracks, originally horse stables, repurposed as prisoner dormitories. These overcrowded, unsanitary conditions led to rampant disease, malnutrition, and extreme suffering.

At its peak in mid-1944, 90,000 prisoners were crammed into Birkenau, enduring forced labor and brutal treatment by SS guards.

Ruins of Crematorium II, destroyed by retreating SS soldiers
Ruins of Crematorium II, destroyed by retreating SS soldiers

Camp Structure and Expansion

Auschwitz II – Birkenau was divided into several sectors:

  • BIa and BIb – the first sections, later used as a women’s camp from 1943.
  • BIIa–BIIg – expanded in 1943–1944, containing:
    • Men’s camp
    • Roma camp (where entire families were imprisoned)
    • “Canada” storage barracks (holding valuables stolen from Jewish prisoners)
  • BIII (“Mexico”) – planned but never completed.

👉 Learn more about the Auschwitz-Birkenau ramp and its significance:
Auschwitz-Birkenau Ramp: Site of Remembrance and Warning

International Monument to the Victims at Auschwitz II - Birkenau
International Monument to the Victims at Auschwitz II - Birkenau

Liberation and Post-War Legacy

On January 27, 1945, Auschwitz II – Birkenau was liberated by the Red Army, revealing the scale of Nazi atrocities. Today, the ruins of crematoria, preserved barracks, and the International Monument to the Victims serve as a lasting reminder of the horrors of the Holocaust.

Visiting Auschwitz II – Birkenau Today

As part of the Auschwitz-Birkenau Memorial and Museum, Birkenau remains one of the most significant historical sites in Poland. Visitors can:

  • Walk through the “Death Gate” where trains carrying victims arrived.
  • See the remains of Krematoria II and III, destroyed by the Nazis.
  • Reflect at the International Monument to the Victims of Auschwitz.
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