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
Graz Innsbruck, Maribor and Ljubljana in Slovenia, Zagreb in Croatia, Budapest in Hungary, Prague and Brno in the Czech Republic, Zürich in Switzerland, as well as Munich, Stuttgart, Heidelberg, and Frankfurt in Germany. Trains for Vienna leave every hour. In recent years many railway stations within the city limits and in the suburbs have been rebuilt or modernised and are now part of the "S-Bahn Graz", a commuter train service connecting the city with its suburban area and towns nearby. Graz airport is located about south of the city centre and is accessible by bus, railway, and car. Direct destinations include