The title "Empress of Bulgaria" refers to the female monarchs who ruled over the historical region of Bulgaria, particularly during the First and Second Bulgarian Empires. The most notable empresses were often the wives of the reigning tsars, playing significant roles in political alliances and cultural development. One prominent figure is Empress Maria Louisa, who was married to Tsar Ferdinand I in the early 20th century. The title reflects the influence of women in Bulgarian history, showcasing their contributions to the nation's governance and heritage during various periods.