Belzec extermination camp Belzec , Polish spelling " Bełżec " , was the first of the Nazi German extermination camp s created for the purpose of implementing the Operation Reinhard – which entailed the murder of some 2 . 2 million Jews , during the Holocaust . The camp was situated in German - occupied Poland about 1 km south of the local railroad station of Bełżec in the Lublin district of the General Government territory , and operated from to the end of . Between 430 , 000 and 500 , 000 Jews are believed to have been murdered by German Nazis at Bełżec , along with an unknown number of Poles and Roma ; only one or two Jews are known to have survived Bełżec and the Second World War : Rudolf Reder and Chaim Hirszman . The lack of survivors , who could have given testimony , is the primary reason why this camp is so little known despite the enormous number of victims . Camp construction and purposes . Bełżec was situated in the Lublin district forty - seven miles north of the major city of Lviv ( Lvov , Lwów ) , conveniently between the large Jewish populations of German - occupied southeast Poland and eastern Galicia . Bełżec extermination camp , the model for two others in the " Aktion Reinhard " murder program , started as a labor camp in April 1940 , in the course of the " Burggraben " - project attached to the Lublin reservation in the same area : the reservation was to serve as a pool for forced labour exploited by various small camps like Bełżec , to erect defensive works along the German Nazi - Soviet demarcation line such as a long anti - tank ditch . While the Burggraben project was shut down by the end of the year due to its inefficiency , Bełżec was re - opened in 1942 to finish part of the anti - tank ditch . On 13 October 1941 , Heinrich Himmler gave SS and Police Leader Lublin , SS Brigadeführer Odilo Globocnik , two orders which were closely connected with each other : to start Germanizing the area around Zamość and to start work on the first German Nazi extermination camp in the General Government near Bełżec . The site was chosen for three reasons : it was situated at the border between the districts Lublin and Galicia , thus indicating its purpose to serve as a killing site for the Jews of both districts ; for reasons of transport it lay next to the railroad and the main road between Lublin and Lvov ; the northern boundary of the planned death camp was the anti - tank ditch dug a year before by Jewish slave workers of the former forced labour camp . The ditch , originally excavated for military reasons , was likely to serve as the first mass grave . Globocnik ' s construction expert SS Obersturmführer Richard Thomalla commenced work in early November 1941 , using Polish villagers , Globocnik ' s Trawniki prisoners and , later , Jewish slave workers . The installation was finished by early March 1942 - the camp then started to turn from a labour to a killing camp as envisioned in the Wannsee Conference . " The leading - decision makers in the Nazi hierarchy who argued for total Jewish extermination by gassing were now coming to the fore . Among the leading advocates in the Generalgouvernement who were in favour of gassing were Dr Wilhelm Dopheide , SS - Obersturmbannführer Dr Ludwig Losacker , SS - Obersturmbannführer Helmut Tanzmann , and SS - Gruppenführer and Governor Otto Wächter . It is intriguing to note that in November 1941 , Dr Dopheide negotiated with SS - Oberführer Viktor Brack at the Führer ’ s Chancellery in Berlin for the use of the expertise of T4 personnel to solve the Jewish Question in his area . If this was the case , Dopheide did not know the purpose of Bełżec , which was already in the course of construction . Clearly , whatever the decision and whenever it was made , once it had commenced there was no let - up , regardless of whether the killings were to take place in the execution pits in the Galician forests , or in the gas chambers at Belzec . " The SS officer Kurt Gerstein mentioned , in his report , that Dr Herbert Linden was in Bełżec , during August 1942 . Prior experience of killers in German Nazi murders of disabled people . The two commanders of the camp , Kriminalpolizei officers " SS - Sturmbannführer " Christian Wirth and " SS - Hauptsturmführer " Gottlieb Hering , had been — in common with almost all of their staff — involved in the Nazi euthanasia Action T4 program since 1940 . Wirth had the leading position as a supervisor of all six euthanasia institutions in the Reich ; Hering as the non - medical chief of Sonnenstein ( Pirna , Saxony ) and Hadamar . As a participant of the first T - 4 test gassing of handicapped people at Brandenburg , Wirth had been a killing expert from the beginning . He was , therefore , an obvious choice to be the first commandant of the first extermination camp in the General Government . It might have been his proposal to transfer the T - 4 technology of killing by carbon monoxide gas in stationary gas chambers to Bełżec , because the comparable technology of mobile gas van s used before December 1941 in the German Nazi extermination camp Chelmno had proven insufficient for the planned number of victims . Changes to killing methods . Wirth developed his own ideas on the basis of the experience he had gained in the " Euthanasia " program and decided to supply the fixed gas chamber with gas produced by the internal - combustion engine of a motorcar . Wirth rejected Zyklon B which was later used at Birkenau . This gas was produced by private firms and its extensive use in Bełżec might have aroused suspicion and led to problems of supply . He therefore preferred a system of extermination based on ordinary , universally available gasoline and diesel fuel . For economic and transport reasons , Wirth did not make use here of industrial bottled carbon monoxide as in T - 4 , but had the same gas supplied by a large engine ( although witnesses differ as to its type , most probably it was a petrol engine ) , whose exhaust fumes , poisonous in an enclosed space , were led by a system of pipes into the gas chambers . For very small transports of Jews and Gypsies over a short distance , a minimized version of the gas van technology was used in Bełżec : T - 4 man and first operator of the gas chambers , SS Hauptscharführer Lorenz Hackenholt , rebuilt an Opel - Blitz post office vehicle with the help of a local craftsman into a small gas van . A member of the staff testified that the Jewish office girls were murdered in this car on the very last day of Bełżec . Concealment of camp ' s purpose from victims . The wooden gas chambers were disguised as the barracks and showers of a labor camp , so that the victims would not realize the true purpose of the site , and the process was conducted as quickly as possible : people were forced to run from the trains to the gas chambers , leaving them no time to absorb where they were or to plan a revolt . Finally , a handful of Jews were selected to perform all the manual work involved with extermination ( removing the bodies from the gas chambers , burying them , sorting and repairing the victims ' clothing , etc . ) . The extermination process itself was conducted by Hackenholt , guards , and a Jewish aide . The Jewish Sonderkommando s were killed periodically and replaced by new arrivals , so that they would neither organize a revolt nor survive to tell about the camp . Camp operation . Eventually , the German Nazi extermination camp of Belzec consisted of two subcamps : Camp I , which included the barracks of the Ukrainians , the workshops and barracks of the Jews , the reception area with two undressing barracks , and Camp II , which contained the gas chambers and the mass graves . The two camps were connected by a narrow corridor called " der Schlauch " , or " Tube " . The German guards and the administration were housed in two cottages outside the camp across the road . Bełżec ' s three gas chambers began operating officially on March 17 , 1942 , the first of the Operation Reinhard camps to begin killing . Its first victims were Jews deported from Lublin and Lwów . There were many technical difficulties in this first attempt at mass extermination . The gas chamber mechanisms were problematic , and usually only one or two were working at any given time , causing a backlog . Furthermore , the corpses were buried in pits covered with only a narrow layer of earth . The bodies often swelled in the heat as a result of putrefaction and the escape of gases , and the covering of earth split . This latter problem was corrected in other death camps with the introduction of crematoria . It was soon realized that the original three gas chambers were insufficient for completing the task at hand , especially with the growing number of arrivals from Kraków and Lviv . A new complex with six gas chambers made of concrete , each 4 × 5 or 8 meters , was erected , and the wooden gas chambers were dismantled . The new facility , which could handle over 1 , 000 victims at a time , was imitated by the other two Operation Reinhard German Nazi extermination camps : Sobibor and Treblinka . There was a sign on the new building that read " Stiftung Hackenholt " or Hackenholt Foundation named after the SS NCO who designed it . In December 1942 , the last shipment of Jews arrived in Bełżec . By that time , the Jews in the area served by Bełżec had been almost entirely murdered , and it was felt that the new facilities under construction at Auschwitz - Birkenau could kill the rest . Closure and dismantlement . A last train with 300 Jewish prisoners , told to depart for Germany but instead sent to Sobibor for gassing , departed in late June 1943 as the closing act of the camp . As part of the Nazi plan called Sonderaktion 1005 , bodies were exhumed and then cremated and bone fragments pulverized . The German and Ukrainian personnel then dismantled the camp and reforested the site with firs and wild lupines . Any equipment that could be reused was taken to the concentration camp Majdanek . Wirth ' s house and the neighboring SS building , which had been the property of the Polish Railway before the war , were not demolished . When the staff left , the local population from the surrounding villages started large - scale excavations on the camp site , searching for gold and valuables . These diggings were so extensive that the area was covered by human remains of all kind , and the Nazis ' efforts to disguise the site were thwarted . In response , SS personnel were again ordered to the camp site to turn it into a farm , with one Ukrainian SS guard assigned to reside there permanently with his family . This model for guarding and disguising former camp sites was later adopted in Treblinka and Sobibor . Subsequent careers of camp personnel . The camp ' s first known commander , Christian Wirth , lived very close to the camp in a house which also served as a kitchen for the SS as well as an armoury . He later moved to the Lublin airfield site to oversee Operation Reinhard . He was transferred to San Sabba , a former rice mill in Trieste , Italy . He received the Iron Cross in April 1944 . He was killed the following month by partisans whilst travelling in an open topped car in what is today western Slovenia . His successor Gottlieb Hering served after the war for a short time as the chief of Criminal Police of Heilbronn and died in autumn 1945 in a hospital . Lorenz Hackenholt survived the war , but disappeared in 1945 . British historian Michael Tregenza may have come close to finding Hackenholt in 1990 and his colleague Alan Heath suggested that he had located where Hackenholt may have been hiding in the 1960s . Only seven former members of the " SS - Sonderkommando Belzec " were indicted in Munich . Of these , just one , Josef Oberhauser , was brought to trial in 1964 , and sentenced to four years and six months in prison , of which he served half before being released . Camp guards . Bełżec camp guards included Germans ( " Volksdeutsche " ) and former Soviet prisoners of war . Before they were posted as " Hiwi " ( German letterword for " Hilfswilligen " , lit . " those willing to help " ) in the concentration camps , most Soviet POWs who served as camp guards underwent special training at the Trawniki SS camp division , originally set up as the holding center for Soviet POWs following Operation Barbarossa . They provided the bulk of " Wachmänner " collaborators in all major killing sites of the " Final Solution " . Kurt Gerstein ' s testimony . SS Lt . Kurt Gerstein , who worked in the SS medical service , was ordered to deliver a shipment of Zyklon B to Bełżec . He was so shocked by what he saw that he immediately buried the canisters of poison gas , and confessed his experiences to the Swedish diplomat Göran von Otter in a train from Warsaw to Berlin , where they met on August 20 . He describes how he arrived at Bełżec on August 19 ( another source gives the date as August 18 ) where he witnessed the unloading of 45 train cars crowded with 6 , 700 Jews , many of whom were already dead , but the rest were marched naked to the gas chambers , where : Death toll . Historian Eugeniusz Szrojt in his 1947 study published by the " Bulletin of the Main Commission for Investigation of the German Crimes in Poland " ( Biuletyn Głównej Komisji Badania Zbrodni Niemieckich w Polsce , 1947 ) following investigation by GKBZNwP which began in 1945 , estimated the number of people murdered in Bełżec as 600 , 000 . This number became widely accepted in literature . Raul Hilberg gave a figure of 550 , 000 . Yitzhak Arad accepted 600 , 000 as minimum , and the sum in his table of Bełżec deportations exceeded 500 , 000 . Józef Marszałek calculated 500 , 000 . British historian Robin O ' Neil once gave an estimate of about 800 , 000 ( based on his investigations at the site ) . German historians Dieter Pohl and Peter Witte , gave estimate of 480 , 000 to 540 , 000 . Michael Tregenza stated that it would have been possible to have buried up to one million victims on the site although the true death toll is probably around half of that amount . The crucial piece of evidence in the debate was published in 2001 by Stephen Tyas and Peter Witte . It was the Höfle Telegram sent by Operation Reinhard ' s Chief of Staff Hermann Höfle , which indicated that 434 , 508 Jews ( " cumulative arrivals " ) were killed in Bełżec through December 31 , 1942 . As the camp had ceased to operate for mass killings by then , this figure needs to be treated as almost absolute in regard to Holocaust trains statistics . " In our view – wrote Pohl & Witte in 2001 – there is no evidence to justify a figure higher than that of 600 , 000 victims . " After this period a sonderkommando of up to 500 people worked in the camp , disinterring the bodies and burning them . The sonderkommando was transported to Sobibor extermination camp around August 1943 and murdered on arrival . The difference between this " low - end " figure and other estimates can be explained by the lack of exact and detailed sources on the deportations statistics . Thus , Y . Arad writes , that he had to rely , in part , on Yizkor books , which were not guaranteed to give the exact estimates of the numbers of deportees . He also had to rely on partial German railway documentation , from the numbers of trains could be gleaned . But here also assumptions had to be made about the number of persons per train . Considering the vagueness of primary sources , many old scholarly estimates are not far off the mark . It should also be noted that it is not completely clear whether the Jews who died in transit are included in the final sum . Considering the aim of compiling such a statistic ( which was to know the overall number of the victims of the " Final Solution " — Hoefle ' s numbers were used in Korherr Report ) they probably were included . Also , the sources like Westermann ' s report contain the exact data about the number of deported persons , but only estimates of the numbers of those who died in transit , the fact which also hints that they were included in the final sum , because it would be hard for the authorities in Bełżec to learn the exact number of those murdered , excluding the dead in transport . Remains of the camp . From late 1997 until early 1998 , a thorough archaeological survey of the site was conducted . The survey was headed by Andrzej Kola , director of the Underwater Archaeological Department at the University of Toruń , and Mieczysław Góra , senior curator of the Museum of Archaeology and Ethnology in Łódź . The team identified the railway sidings and remains of a number of buildings . They also found 33 mass graves , the largest of which were 210 by 60 feet . The team estimated that they had found 15 , 000 unburned bodies , and " " The largest mass graves . . . contained unburned human remains ( parts and pieces of skulls with hair and skin attached ) and entire bodies preserved in wax - fat transformation . The foul smelling bottom layer of the graves consisted of several inches to a meter thick of human fat resembling black soap . One grave contained uncrushed human bones so closely packed that the drill could not penetrate . " " Postwar commemoration . As a result of the Nazi German efforts to erase evidence of the camp ' s existence near the war ' s end , almost all its traces disappeared from the site . Even though , the leveled - out mass graves of the camp ' s victims remained , there were no survivors to alert the Stalinist officials to the true significance of the site in the postwar years . Therefore the scene was not legally protected until the late 1940s . Some local inhabitants dug in the ground to look for concealed valuables buried with the ashes . Pursuit of the Nazi German perpetrators of the Holocaust in Germany in the second half of the 1950s drew first serious attention to the site . Furthermore , Soviet trials of Russian camp personnel held in Kiev and Krasnodar in the early 1960s soon followed suit . In the 1960s the area of the former camp was fenced off , and the first few monuments were placed on the site . The fenced area did not correspond to the actual area of the camp during its operation due to lack of proper evidence and modern forensic research , and so some commercial development took place on areas formerly belonging to it . Due to the isolated location on Poland ' s eastern border , only a very small number of people visited the former camp before 1988 . The site was largely forgotten and poorly maintained . Following the collapse of the Soviet dictatorship in 1989 , the situation slowly changed . As the number of visitors to Poland interested in Holocaust sites increased , more of them came to Bełżec . Many reacted negatively to the unkept state of the grounds . In the late 1990s extensive investigations were carried out on the camp grounds to determine precisely the camp ' s extent and provide greater understanding of its operation . Buildings constructed after the war on the camp grounds were removed . In 2004 , Belzec became a new branch of the Majdanek State Museum , and a large new monument commemorating the camp ' s victims was unveiled .