The Danube cruise ship came to Linz, except for the central square, which is St. Mary's Cathedral. The church is very close to the central square of Linz, a 3-minute walk, is a Gothic-style building, and is the second largest Catholic church in Austria. There are painted glass and pipe organ inside the church. There are fewer tourists, so it is quiet. But compared to other churches, whether it is scale or interior structure or decoration, this church is very ordinary.