Boris III was the Tsar of the Kingdom of Bulgaria from 1918 until his death in 1943.
Formal portrait, c. 1918–19
Crown Prince Boris (2nd from left) and German field marshal Mackensen reviewing a Bulgarian regiment accompanied by the Commander in Chief General Zhekov and the Chief of Staff Army General Zhostov during World War I
King Boris' manifesto of ascension to the throne
The Royal Sceptre of Boris III
Ferdinand I was the monarch of Bulgaria from 1887 to 1918, reigning as Prince of Bulgaria from 1887 to 1908 and Tsar of Bulgaria from 1908 until his abdication in 1918. Under his rule, Bulgaria began
Boris III of Bulgaria
…Treti; 30 January [O.S. 18 January] 1894 – 28 August 1943) was the Tsar of the Kingdom of Bulgaria from 1918 until his death in 1943. The eldest son of Ferdinand I, Boris assumed the throne upon the abdication of his father in the wake of Bulgaria's defeat in World War I. Under the 1919 Treaty of Neuilly, Bulgaria…
The Nine Sovereigns at Windsor for the funeral of King Edward VII, photographed on 20 May 1910. Standing, from left to right: King Haakon VII of Norway, Tsar Ferdinand of the Bulgarians, King Manuel II of Portugal and the Algarve, Kaiser Wilhelm II of Germany and Prussia, King George I of the Hellenes and King Albert I of the Belgians. Seated, from left to right: King Alfonso XIII of Spain, King George V of the United Kingdom and King Frederick VIII of Denmark.
Emperor Wilhelm and Tsar Ferdinand in Sofia, 1916
WWI-era portrait of Ferdinand I