Glockenturm (Bell Tower) of Heilig-Kreuz-Münster, Schwäbisch Gmünd

A massive Romanesque bell tower. It serves as a campanile for the neighboring cathedral.

The bell tower, which was previously called the bell house, is a Romanesque building that was built around 1228 and now houses the bells of the Holy Cross Minster in Schwäbisch Gmünd. He is therefore a campanile. This shape of a bell tower is unique in the Swabian region.
There is only reliable evidence for the bell tower of the Holy Cross Minster from 1578, but it has always been assumed that this building was set up or rebuilt as early as 1497 to replace the collapsed towers. It remained a permanent temporary arrangement, as any plans to rebuild the cathedral's towers were not realized
de.wikipedia.org/wiki/Glockenturm_(Schw%C3%A4bisch_Gm%C3%BCnd)

Located right next to the cathedral, you pass right by it.