20 minutes walking distance from Hotel Papageno

Standing at 136 meters tall (445 ft) and affectionately referred to by the Viennese as the "Steffl" (a diminutive form of "Stephen"), St. Stephen's Cathedral's massive south tower is its highest point and a dominant feature of the Vienna skyline. Its construction lasted 65 years, from 1368 to 1433. During the Siege of Vienna in 1529 and again during the Battle of Vienna in 1683, it served as the main observation and command post for the defense of the walled city, and it even contains an apartment for the watchmen who, until 1955, manned the tower at night and rang the bells if a fire was spotted in the city. At the the tip of the tower stands the double-eagle imperial emblem with the Habsburg-Lorraine coat of arms on its chest, surmounted by a double-armed apostolic cross, which refers to Apostolic Majesty, the imperial style of kings of Hungary.

The north tower was originally intended to mirror the south tower, but the design proved too ambitious, considering the era of Gothic cathedrals was nearing it's end, and construction was halted in 1511. In 1578 the tower-stump was augmented with a renaissance cap, nicknamed the "water tower top" by the Viennese. The tower now stands at 68 meters tall (223 ft), roughly half the height of the south tower.

The composer Ludwig van Beethoven discovered the totality of his deafness when he saw birds flying out of the bell tower as a result of the bells' tolling but could not hear the bells. St. Stephen's Cathedral has 23 bells in total. The largest is officially named for St. Mary, but usually called Pummerin ("Boomer") and hangs in the north tower