Auschwitz-Birkenau is the largest camp of concentration and extermination of the Nazi Germany used during the II World War.
It's situated in Poland, near the city of Oświęcim.
It was built in 1940 by Nazists and there were exterminated over 3 milions of people
(Which Jews, German criminals, polish intellectuals, war prisoners, politic enemies and homsexuals).