Updated: Oct 2, 2022
Saint Stephan Cathedral in Vienna is one of the city's symbols and the sitting place of the Catholic Archbishop of Vienna.
The cathedral was built in 1147 and rebuilt in a gothic style in the 14th-century.
When I visited, it wasn't possible to see the whole church because of a fence they built to avoid access. However, they were arrangements for a concert, so maybe it is possible at different times.
In any case, this is an imposing church located in Stephanplatz, the most central place in the city, so it is worth paying a short visit.