Jewish uprising. The Nazi hierarchy took measures to modify the killing process under Stangl, who built more-efficient gas chambers and massive cremation pyres for the incineration of corpses. When the Treblinka death camp ended operations in October 1943, the Nazis attempted (in vain) to remove all evidence of its existence and the mass murder carried out there. Relatively little physical evidence remains. It can be examined at the Treblinka Museum, which is led by Edward Kopówka. The number of visitors there has been steadily growing. An earlier forced-labor camp known as Treblinka I Arbeitslager, equipped with heavy machinery, was located from Treblinka. Between June 1941 and 23 July 1944, more than half of its 20,000 inmates mining gravel for the German military road construction, died from summary executions, hunger, disease, and mistreatment under Commandant Theodor van Eupen. Treblinka extermination camp museum The construction of a stone monument with abstract reliefs and Jewish symbols was inaugurated on 21 April 1958 based on a design by sculptor Franciszek Duszeńko. He expressed the European trend toward stylized and avant-garde forms. The monument was unveiled by Zenon Kliszko, the Marshal of the Sejm of the Republic of Poland on 10 May 1964; attendees included survivors of the Treblinka uprising from Israel, France, Czechoslovakia, and Poland. The official ceremony was attended by 30,000 people, when Treblinka was declared a national monument of martyrology. The camp custodian's house (built nearby in 1960) was adapted as an exhibition space following the collapse of the Soviet Union in 1989. Since the late 20th century, the number of visitors coming to Treblinka from abroad has steadily increased. An exhibition centre at the former camp opened in 2006. It was later expanded and made into a branch of the Siedlce Regional Museum, under Dr Edward Kopówka. Footnotes Citations References Map of Treblinka Jewish Community of Treblinka on Virtual Shtetl Holocaust locations in Poland