The Memorial Tomb of Alexander I of

Battenberg (Bulgarian: Гробница паметник „Александър І Батенберг“, Grobnitsa pametnik „Aleksandar І Batenberg“), better known as the

Battenberg Mausoleum (Мавзолей на Батенберг, Mavzoley na Batenberg) in Sofia, the capital of Bulgaria, is the mausoleum and

final resting place of Prince Alexander I of Bulgaria (1857–1893), the first Head of State of modern Bulgaria.

Commissioned to the Swiss architect Hermann Mayer, designed in the eclectic style (with prominent elements of Neo-Baroque and

Neoclassicism) and opened in 1897, the mausoleum measures 11 metres in height and 80 square metres in area.