Fünfknopfturm Kaufbeuren, Medieval tower in Kaufbeuren, Germany.

The Fünfknopfturm is a medieval tower in Kaufbeuren whose stone walls are decorated with five characteristic button-shaped protrusions. The structure stands on Afraberg and was originally part of the city's defensive fortifications.

The tower was built in the medieval period and formed an essential part of Kaufbeuren's defensive system. Its construction shows typical characteristics of the defensive architecture of that era, with solid stone and strategic placement within the city walls.

The tower's name comes from its five button-shaped pinnacles, a form typical of Gothic defensive towers rather than a local invention. It served as the seat of the town fire watch: from the height the old town could be surveyed and the population warned of fire or other danger by a bell in the tower. The tower keeper's room remained inhabited until spring 2014.

The tower is located on Afraberg and is easily accessible and viewable from the outside. Visitors can observe the architecture and distinctive ornaments at their leisure, as no special requirements are needed for an exterior visit.

The shield on the east facade was nailed in 1917 as a war emblem: an iron figure of a warrior covered with 5,387 nails, bearing the flags of the Central Powers — the Ottoman Empire, Bulgaria, the German Reich and Austria-Hungary. The tower's keeper's room remained inhabited until spring 2014.