Bismarck Mausoleum, Romanesque Revival mausoleum in Friedrichsruh, Aumühle, Germany.

The Bismarck Mausoleum on the Schneckenberg near Friedrichsruh is a neo-Romanesque burial chapel designed by Ferdinand Schorbach and completed in spring 1899. Its dominant octagon with pyramidal roof, inspired by Romanesque crossing towers, holds the marble sarcophagi of Otto von Bismarck and Johanna von Puttkamer; a single-nave chapel with a rounded apse adjoins to the east. The tuff structure stands on a base of irregular granite blocks.

Otto von Bismarck died in 1898 and was buried together with his wife Johanna in the newly built structure. Kaiser Wilhelm II attended the ceremonial interment on March 16, 1899.

The chapel's epitaph, chosen by Bismarck himself, reads "Ein treuer deutscher Diener Kaiser Wilhelms I." His wife Johanna's sarcophagus carries the biblical verse 1 John 4:16. In the apse window an angel holds a band inscribed "Pax vobiscum," and above the arch stands Colossians 3:23. The Bismarckbund and, each 27 May, survivors of the battleship Bismarck held memorial gatherings here.

The chapel and grounds are privately owned by the Bismarck family but open to visitors and can be booked for private tours or celebrations. The lower family crypt is not accessible to the public; the upper octagon with the two marble sarcophagi is. Access is via the porch on the south side, whose portal tympanum bears Bismarck's coat of arms.

The claim that the octagon's plan copies Theoderic's tomb in Ravenna is false: that tomb has a ten-sided ground plan, and the mausoleum's architecture does not follow the model either. The error was long repeated in print.