with Celtic fortress Wienertor (Vienna Gate): built in the 13th century, largest still existing medieval gate in Europe. Today it contains the city museum. The Philippus-und-Jakobus-Kirche, a catholic church, was built in 1263 and rebuilt in the Baroque style in 1683 Protestant Church, opened in April 2011, newly built by the Austrian architect group Coop Himmelb(l)au Economics and infrastructure In 2001, there were 242 businesses and 29 agricultural and forestry businesses. There were 2,512 employed persons. The productivity rate was 45.07%. There were 70 unemployed persons. Twin towns – sister cities Hainburg an der Donau is twinned with the following towns and cities: Nieder-Roden (Rodgau), , since 1975 Šamorín, , since 2008 References External links Official site of the village Hainburg (German) 'Donauauen' (English/German) 'Wienertor' (German) "20 years of Occupation of Hainburger Au" (German) Populated places on the Danube Cities and towns in Bruck an der Leitha District