. . . . "Ottoman Empire" . . . . "surrendered the city" . "Unknown" . "Bulgaria" . "three-month siege" . . "Second Bulgarian Empire" . "Ottoman victory" . . "30pxBulgarian Empire" . . . . . . "30pxOttoman Empire" . . . . "Siege of Sofia" . . . . "Sofia" . . "Bulgarian Empire" . "fall of Sofia" . . . . "take" . . "Siege of Sofia" . . "Unknown" .