That's a republican idea (with a small r), or maybe a nationalist one. Monarchs on the other hand had a habit of collecting titles. If you only had one title as the head of one political entity, you were obviously a very insignificant leader. Conquered territories often continued to exist as separate entities that just happened to have the same monarch, rather than being annexed into the dominant country.
By the Grace of God Emperor of Austria; Apostolic King of Hungary, King of Bohemia, Dalmatia, Croatia, Slavonia, Galicia and Lodomeria; King of Jerusalem etc.; Archduke of Austria; Grand Duke of Tuscany and Cracow; Duke of Lorraine, Salzburg, Styria, Carinthia, Carniola and Bukowina; Grand Prince of Transylvania, Margrave of Moravia; Duke of Silesia, Modena, Parma, Piacenza, Guastalla, Auschwitz and Zator, Teschen, Friuli, Dubrovnik and Zadar; Princely Count of Habsburg and Tyrol, of Kyburg, Gorizia and Gradisca; Prince of Trent and Brixen; Margrave of Upper and Lower Lusatia and Istria; Count of Hohenems, Feldkirch, Bregenz, Sonnenburg etc.; Lord of Trieste, Kotor and the Windic March, Grand Voivod of the Voivodeship of Serbia etc.
His Excellency, President for Life, Field Marshal Al Hadji Doctor Idi Amin Dada, VC, DSO, MC, CBE, Lord of All the Beasts of the Earth and Fishes of the Seas and Conqueror of the British Empire in Africa in General and Uganda in Particular.
