The current Central Mineral Baths building was designed in the Vienna Secession style, but integrating typically Bulgarian, Byzantine and Eastern Orthodox ornamental elements, by the architects Petko Momchilov and Friedrich Grünanger in 1904–1905. The north wing was damaged during the bombing of Sofia in World War II, but was restored several years later. The baths continued to work as public baths until 1986, when the building was closed due to its bad condition and the possible collapse of the roof. It was subsequently partially reconstructed and thoroughly cleaned and accommodates the Sofia Regional Historical Museum since September 2015.