Nazi Germans had created a ghetto for Jews in the city. Approximately 45,000 of Częstochowa's Jews, almost the entire community, were killed by the Germans. Life in German-occupied Częstochowa is depicted in the Pulitzer Prize-winning graphic novel Maus, by Art Spiegelman, the son of a Jewish Częstochowa resident. Before the Holocaust, Częstochowa was considered a great Jewish centre in Poland. By the end of World War II, nearly all Jews had been killed or deported to extermination camps to be killed, making Częstochowa what Nazi Germany called judenfrei. There are many known cases of local Polish men and women, who were captured and persecuted by the Germans for rescuing and aiding Jews. These Poles were sentenced to death, prison or concentration camps, in which some died, some survived, while the fate of many remains unknown. Poles who saved Jews in other places in the region were also either sentenced to death by the local German court or incarcerated in the local prison. The Germans also tried to obscure the Catholic shrine and pilgrim devotion by renaming the road leading to the pilgrimage church after Hitler, though they did allow some pilgrimage activity to continue. During and after the Warsaw Uprising, in August–October 1944, the Germans deported thousands of Varsovians from the Dulag 121 camp in Pruszków, where they were initially imprisoned, to Częstochowa. Those Poles were mainly old people, ill people and women with children. In late December 1944, there were 14,671 registered Poles, who were expelled from Warsaw. In the autumn 1944, Germans fortified the city, preparing for a lengthy defence. On January 16, 1945, however, the Wehrmacht retreated after just one day of fighting. The city was restored to Poland, however, with a Soviet-installed communist regime, which remained in power until the Fall of Communism in the 1980s. Recent period Due to the communist idea of fast industrialisation, the inefficient steel mill was significantly expanded and named after Bolesław Bierut. This, combined with the growing tourist movement, led to yet another period of fast city growth, concluded in 1975 with the creation of a separate Częstochowa Voivodeship. In the immediate post-war period, Częstochowa belonged to Kielce Voivodeship (1945–1950), and then the city was transferred to Katowice Voivodeship. In the Polish People's Republic, Częstochowa emerged not only as an industrial, but also academic centre of the region. The city expanded, with the first tram lines opened in 1959. On