Battenberg Mausoleum, Monument on Vasil Levski Boulevard in Sofia, Bulgaria.

The Battenberg Mausoleum is a single-domed tomb at 81 Vasil Levski Boulevard, built in an eclectic style mixing Neoclassicism and late Baroque. It measures 11 metres in height and 80 square metres in area, is symmetrically shaped with four arched niches, and its dome ends in a brass crown.

Constructed in 1897 by Swiss architect Hermann Mayer, the mausoleum was built to house the remains of Prince Alexander I of Bulgaria, who died in exile in Graz, Austria in 1893.

The interior decoration was created by renowned Bulgarian artist Haralampi Tachev, whose paintings and artistic elements reflect the national symbols and pride of late 19th-century Bulgaria.

The mausoleum stands at 81 Vasil Levski Boulevard in central Sofia, managed by the Regional History Museum – Sofia. It was closed to visitors from 1946/1947 until 1991 and has since reopened; it was partially restored in 2005. The interior is compact, with the sarcophagus and wall inscriptions visible from the entrance.

The mausoleum houses personal possessions and documents of Prince Alexander I that were donated by his wife Johanna Loisinger in 1937, providing rare insights into his private life.