The Stadttempel (English: City Prayer House), also called the Seitenstettengasse Temple, is the main synagogue of Vienna, Austria. It is located in the Innere Stadt 1st district, at Seitenstettengasse 4.
The synagogue was constructed in 1824 and 1826. The luxurious Stadttempel was fitted into a block of houses and hidden from plain view of the street, because of an edict issued by Emperor Joseph II that only Roman Catholic places of worship were allowed to be built with facades fronting directly on to public streets.
Ironically, this edict saved the synagogue from total destruction during the Kristallnacht in November 1938, since the synagogue could not be destroyed without setting on fire the buildings to which it was attached. The Stadttempel was the only synagogue in the city to survive World War II, as the Nazis destroyed all of the other 93 synagogues and Jewish prayer-houses in Vienna.
In August 1950, the coffins of Theodor Herzl and his parents were displayed at the synagogue, prior to their transfer for reburial in Israel.
In the 1981 Vienna synagogue attack, two people from a bar mitzvah ceremony at the synagogue were murdered and thirty injured when Palestinian Arab terrorists attacked the synagogue with machine guns and hand grenades.
Today the synagogue is the main house of prayer for the Viennese Jewish Community of about 7,000 members.
The synagogue has been declared a historic monument.
The synagogue was designed in elegant Biedermeier style by the Viennese architect Joseph Kornhäusel, architect to Johann I Joseph, Prince of Liechtenstein, for whom he had built palaces, theaters and other buildings. Construction was supervised by the official municipal architect, Jacob Heinz.