http://en.wikipedia.org/wiki/Otwock Following the Nazi–Soviet Invasion of Poland, a murderous Action T4 euthanasia program was carried out by the Nazi Germans in a local psychiatric hospital. In December 1939, German authorities established a Jewish ghetto in Otwock, in order to confine its Jewish population for the purpose of persecution and exploitation. The Ghetto was liquidated between August and September 19, 1942, when 75% of its Jewish population of 12,000–15,000 numbering at around 8,000 were assembled by the Nazis at a layover yard in Otwock (pictured) and transported in cattle trucks to extermination camps in Treblinka and Auschwitz. Jews who remained were summarily shot at Reymonta Street soon after.
Otwock is a hometown of Irena Sendler (1910 – 2008), the Polish humanitarian who saved thousands of Jewish children during the Holocaust; as well as Krystyna Dańko, both awarded the titles of Righteous among the Nations by Yad Vashem. Writer Calel Perechodnik, a Jewish Ghetto Policeman from Otwock also hailed from this town. Following the liberation, a children's home for Holocaust survivors was established in Otwock.