Nazi camps, Jewish kapos were absent from the camp and there is little evidence an internal hierarchy among Jewish prisoners has ever developed. The first transport of Jewish prisoners arrived from Auschwitz-Birkenau on 31 August 1943, and three subsequent ones were made up to 27 November the same year, bringing 3,683 Jews in total, according to official data. The labourers represented Jews from various countries – the most numerous were Greek Salonican Jews, but some Austrian, Belgian, French, Dutch, German and even 50 Polish representatives of that religion (who only came because Germans had to meet 1,000 people transport quota) arrived to Warsaw as well. The ethnic composition changed substantially in spring 1944, when several trains from Auschwitz delivered 3,000 Hungarian Jews (most of whom originally were deported from ghettos in Hungarian-occupied Carpathian Ruthenia, established in the cities of Mukachevo, Uzhhorod, Khust and Tiachiv) who became the majority in the Warsaw concentration camp in the last months of its existence. The exact number of prisoners who went through KL Warschau remains difficult to ascertain, as witness and expert estimates vary from 1,500 to 40,000. As Gabriel N. Finder noted, the Warsaw concentration camp played a minor role in the Holocaust in comparison to other camps and is thus often absent from standard narratives of the period. In his entry in the Encyclopedia of Camps and Ghettos, he suggested that some 8,000–9,000 people were incarcerated there. Bogusław Kopka says in his monograph that at least 7,250 inmates went through the Warsaw concentration camp, including 300 German prisoner functionaries, about 3,700 Jews who arrived in 1943 and 3,000 Jews who came in 1944 from Auschwitz, in addition to 50 highly skilled Jews sent to the camp by the Ostbahn in 1943 and 200 Jews moved from the Pawiak prison. Successful escapes were rare and Jews who were caught in the attempt were hanged in front of the assembled prisoner population. Tasks Prisoners were tasked with constructing the concentration camp they were residing in, demolishing the remaining ruins of the ghetto, clearing of rubble and with flattening the terrain at above the previous ground level, so as to convert the former ghetto into a park as Himmler envisaged in his order from 11 June 1943. While doing that, the workers were also ordered to salvage building materials (mainly scrap metal and bricks) for the German war effort. of buildings were demolished, with some