Franz Joseph I, Alfred Nobel, and Albert Einstein amongst its guests. The 1930 census showed that the Hungarian population had decreased to under 20% of the city, and Hungarian language signs were removed. Between 1938 (October) – 1939 (March), Bratislava became the seat of government of the autonomous Slovakia within Czechoslovakia (see e.g. Jozef Tiso). Between 1938 (November) – 1945, the future Petržalka borough was occupied by Nazi Germany, and from October 1938 to April 1945, the future Devín borough was part of the Lower Austria area of the German Third Reich. After the break-up of Czechoslovakia, Bratislava became the capital of the First Slovak Republic in 1939. By 1945, most of the city's approximately 15,000 Jews had been removed and sent to concentration camps. The Bratislava oil district, including the Apollo oil refinery, was bombed on 9 September 1944 during the German occupation. The Soviet Red Army took Bratislava on 4 April 1945. After World War II After the war, most of the German population were expelled (some Germans had already been evacuated by German authorities). In 1946, Jews living in the city were attacked during the Partisan Congress riots. In 1946, the city incorporated the neighbouring villages of Devín, Dúbravka, Lamač, Petržalka, Prievoz (now part of Ružinov), Rača, and Vajnory (Karlova Ves had been annexed in 1944). The so-called Bratislava bridgehead on the right bank of the Danube was enlarged in 1947 with the hitherto Hungarian villages of Jarovce, Rusovce and Čunovo, in accord with the Paris Peace Conference, which transferred these villages to Czechoslovakia, on the grounds that Bratislava needed space for growth. After the Communists seized power in February 1948, the city became part of the Eastern Bloc. Several present-day cultural institutions were established (first films made in the town in 1948; Slovak Philharmonic Orchestra founded in 1949; Slovak National Gallery in 1951, Slovak Academy of Sciences in 1953, Bratislava Gallery in 1959, Slovak Television in 1956), several factories and landmarks were built (sometimes at the expense of the historical cityscape) – Slavín in 1960, Kamzík TV Tower in the 1970s, reconstruction of the Bratislava Castle in 1953–62, and Nový Most, the second bridge over the Danube, in 1972; and factories (Bratislavské automobilové závody and Slovnaft). The city was also affected by the unsuccessful Czechoslovak attempt to liberalize the Communist regime in 1968. Shortly after that, the city became capital of the Slovak Socialist Republic, a