Our country has already overthrown the imperial system, but there are still some countries in Europe where there are still royal families, such as the familiar Queen of England, the King of Spain, the King of Denmark and so on. So why don't these people call themselves emperors, but kings?
The UK is also a country with a long history. At its peak it was called the Empire of the Rising Sun, and before World War I it was also a great power, with many countries being their colonies. But with so much power, why are their rulers called kings and not emperors? Could it be that the king of England only wants to be a king, not an emperor?
Everyone knows that the status of the emperor is much greater than that of the king, and the king also wants to be the emperor, but the king of England wants to crown himself as an emperor. For example, the supreme ruler of ancient Rome was called the emperor, although the country was divided, but because of religion and blood, the supreme leader of the Austro-Hungarian Empire can still be called the emperor. Because they were somewhat related to the emperors of the Roman Empire, they were also related to the pope.
But the English king did not have the blood of the Roman Empire, without which he would naturally not be crowned by the pope, and therefore could not be called emperor. But in order to satisfy his dream of becoming an emperor, the British king named himself the emperor of India, which is also an emperor, so that he can sit on an equal footing with the emperors of Europe.
The Emperor of the German Empire was called the German Emperor because the predecessor of this empire was the Kingdom of Prussia, and the Kingdom of Prussia was a traditional country in Europe, and his predecessor was also the Holy Roman Empire, and naturally there was also a blood relationship of the Holy Roman Empire, so that he could be called emperor. The Tsar of Russia, on the other hand, was qualified to be called Emperor by marrying a Roman princess and declaring his inheritance to the Roman Empire.
Seeing this, everyone should understand that if you want to be emperor, you must be related to the Roman Empire or the Holy Roman Empire, and you must also be crowned by the Pope. And there is a man in history who refused to be crowned by the pope, and he directly put a crown on himself. This man was Napoleon, but in the end it was very tragic.