part of federalized Czechoslovakia, after the signing of the Law of Federation at the Bratislava Castle in 1968. Since the 1960s, construction of the huge prefab panel buildings had been ongoing. The city also expanded once more in 1972, annexing villages of Jarovce, Rusovce, Čunovo, Devínska Nová Ves, Záhorská Bystrica, Vrakuňa and Podunajské Biskupice. The third bridge over the Danube, called Prístavný most (Harbour Bridge) was built in 1985. The fall of the Communist regime was anticipated by the candle demonstration in 1988, which was violently scattered by the police. After the fall of Communism In November 1989 the city became one of the centres of the Velvet Revolution; Alexander Dubček held his first speech in the city since 1970, and (one day before demonstrations in Prague), Slovak students rallied against the Communist regime on 16 November 1989; further demonstrations would follow. The first non-Communist political party, "Public Against Violence" (Verejnosť proti násiliu, VPN) was established on 21 November. During the late 1980s and early 1990s, Bratislava was plagued by a rise in criminality. From 6 October 1990 to 16 July 1991 Bratislava had two active serial killers – Ondrej Rigo and Jozef Slovák. In 1991 the factory of the automaker Volkswagen was founded in Bratislava (until 1994 as a joint venture with the Bratislavské automobilové závody); the fourth bridge over the Danube, Most Lafranconi, was built. On 17 July 1992 the Declaration of Independence of the Slovak Nation was adopted by the Slovak National Council (called National Council of the Slovak Republic since 1994). Six days later the prime ministers of the two constituent republics of Czechoslovakia agree to split the country into two independent states; the Constitution of Slovakia was adopted 1 September and signed at Bratislava Castle 3 September. After the Dissolution of Czechoslovakia in 1992 the city was declared the capital of independent Slovakia. 21st century Demographic evolution The ethnic makeup of the town's population during the last two centuries has been as follows: 1850 Germans (75%), Slovaks (18%), Hungarians (7.5%) – Note: all population data before 1869 are not exact – 1880 Germans (68%), Slovaks (8%), Hungarians (8%) 1910 Germans (41.92%), Slovaks (14.92%), Hungarians (40.53%), of total population of 78,223 Note: the period after 1848 was a period of strong magyarisation in the Kingdom of Hungary; immigration of Hungarians and magyarisation in Bratislava. Also note that in the same time, the municipal area around the