Yet another patchwork of architectural styles, but predominantly Gothic. None of the original construction remains, the oldest extant sections are the thirteenth century Giant Gate (Riesentor) and Towers of the Heathens (Heidentürme), both of which are Romanesque. In 1511, building in Gothic style ceased due to being out of fashion. The main altar has a Baroque panel showing St. Stephen, Christianity's first martyr. The organised tour is worth it, since some of the finest works of art in the cathedral can only be seen with a guide, such as Emperor Frederick III's red marble sepulcher and the immense Gothic carved Altar of Wiener Neustadt. Those interested in attending Mass may come Saturdays at 7PM for an English service.

St. Stephen's Cathedral (German: Domkirche St. Stephan [ˈdɔmˌkɪʁçə ˈzaŋkt ˈʃ͡tɛfan] also known as Stephansdom German pronunciation: [ˈʃ͡tɛfansˌdoːm]) is a Roman Catholic church in Vienna, Austria, and the mother church of the Archdiocese of Vienna. It is the seat of the Archbishop of Vienna, Josef Grünwidl.

The current Romanesque and Gothic form of the cathedral, seen today in the Stephansplatz, was largely initiated by Duke Rudolf IV (1339–1365) and stands on the ruins of two earlier churches, the first a parish church consecrated in 1147. The most important religious building in Vienna, St. Stephen's Cathedral has borne witness to many important events in Habsburg and Austrian history and has, with its multi-coloured tile roof, become one of the city's most recognizable symbols. It has 256 stairs from the top to the bottom