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 travel within the city for three days, as well as giving reduced admission charges at selected attractions. The ticket is available at hotels and other accommodation, at the city tourist information office, at ticket sale counters at the Schloßbergbahn funicular, and at Graz Airport. With the introduction of the full set of Variobahn trams, many of Graz's older high-floor trams will be retired. It is also planned to lengthen the new Variobahn trams by adding 2 further sections to the trams. There are plans for a number of extensions to existing lines plus the building of 2 new lines. On