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
Simmering-Graz-Pauker (trams, metro ("Silver Arrow" and "V-wagon"), trains). During the 1950s Simmering-Graz-Pauker A.G. developed the SGP M-222 Flamingo, their first aircraft. It was a conventional twin engine monoplane, smaller than many but seating four in two rows. The first prototype flew for the first time on 15 May 1959 but was lost in a fatal crash during single engine tests on 2 August 1959. Development work continued on a second aircraft which first flew in 1960 and a third followed in 1962. The fourth aircraft, now renamed the "Simmering-Graz-Pauker SGP.222" was intended as a production prototype and demonstrator and appeared at