The Muppberg, not to be confused with the nearby district called Mupperg of the municipality of Föritztal, is a 515.7-meter-high (1,692 ft) mountain located in Bavaria between Neustadt bei Coburg, Sonneberg and Heubisch.

[1] On the summit stands the Arnoldhütte, a refuge named after Max Oscar Arnold, and next to it the Prinzregententurm.

The tower, which was inaugurated on June 4, 1905, was named after Ernst II, Prince of Hohenlohe-Langenburg, who, after the death of his father-in-law Duke Alfred on July 30, 1900, was in charge of the government of the duchies of Saxe-Coburg and Gotha until July 18, 1905, on behalf of Charles Edward (German: Carl Eduard), who was still underage.

The round tower made of sandstone in Art Nouveau style has a pedestal with reliefs by the sculptor Emil Bunzel based on designs by Max Derra depicting Prince Regent Ernst zu Hohenlohe-Langenburg on the west side, Duke Ernest II (German: Ernst II) on the east side, Duke Alfred on the north side and Duke Charles Edward on the south side.

In the past, the Ottilienkapelle (Ottilien chapel) stood on the Muppberg, which was likely founded after 1071.