Graz-Karlau Prison serial killer Wolfgang Ott; and the terrorist Tawfik Ben Chaovali, who was involved in the Rome and Vienna airport attacks. Graz-Karlau Prison Graz-Karlau Prison () is located in Gries, the 5th district of the city of Graz, capital of the Austrian state of Styria. With a capacity of 552 inmates, Graz-Karlau is the third largest prison in Austria. Built between 1584 and 1590 in late Renaissance style to designs by Antonio Tade and Antonio Marmoro, it was used as a summer hunting residence for Archduke Karl II of Austria. Originally, it was called "Dobel Castle". The German word "Dobel" is
Trams in Graz by 1967. In the 1990s, with the city's narrow central streets proving ill-suited to large quantities of private car traffic, the city adopted a policy of improving and expanding public transport, with modernisation and extension of the tramway. The area around "Jakominiplatz" was developed as the main tram and city bus interchange from 1995, whilst extensions to "Puntigam", "Liebenau Murpark" and "St Paul" followed in 2006 and 2007. In 2001, Graz was the launch customer for the Bombardier Transportation's Cityrunner design, with the acquisition of 18 long five-section trams. These were the city's first 100% low-floor trams, although the concept