![File:Franz Joseph I, Emperor of Austria, from the Rulers, Flags, and Coats of Arms series (N126-2) issued by W. Duke, Sons & Co. MET DPB873864.jpg - Wikimedia Commons File:Franz Joseph I, Emperor of Austria, from the Rulers, Flags, and Coats of Arms series (N126-2) issued by W. Duke, Sons & Co. MET DPB873864.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/c/c9/Franz_Joseph_I%2C_Emperor_of_Austria%2C_from_the_Rulers%2C_Flags%2C_and_Coats_of_Arms_series_%28N126-2%29_issued_by_W._Duke%2C_Sons_%26_Co._MET_DPB873864.jpg)
File:Franz Joseph I, Emperor of Austria, from the Rulers, Flags, and Coats of Arms series (N126-2) issued by W. Duke, Sons & Co. MET DPB873864.jpg - Wikimedia Commons
![Charles I of Austria and the IV of Hungary, was the last ruler of the Austro-Hungarian Empire, and the last King of Hungary, seen here in uniform : r/ColorizedHistory Charles I of Austria and the IV of Hungary, was the last ruler of the Austro-Hungarian Empire, and the last King of Hungary, seen here in uniform : r/ColorizedHistory](https://c2.staticflickr.com/8/7685/27229585794_966ccc7c40_o.jpg)
Charles I of Austria and the IV of Hungary, was the last ruler of the Austro-Hungarian Empire, and the last King of Hungary, seen here in uniform : r/ColorizedHistory
Why had the archduke of Austria, despite being the imperator of the Holy Roman Empire for centuries, never the title of a king? And why was there a title like archduke? -
The Holy Roman Empire and the Habsburgs, 1400–1600 | Essay | The Metropolitan Museum of Art | Heilbrunn Timeline of Art History
![Charles (I) | Charles I | Emperor of Austria & Last Ruler of the Austro-Hungarian Monarchy | Britannica Charles (I) | Charles I | Emperor of Austria & Last Ruler of the Austro-Hungarian Monarchy | Britannica](https://cdn.britannica.com/91/141091-050-8FB36C78/Charles.jpg)