Answer :
In the early 1900s, a tsar, who was comparable to a king, ruled Russia. The ancient kings of Russia, Serbia, and Bulgaria bore the royal title of tsar.
Tsar can be compared to an emperor or king, depending on the nation and the era.
Although the Moscow Empire is most often linked with the name "tsar," Simeon I, a Bulgarian tsar who ruled from 893 to 927, was the first to hold this title in honor of his contributions to the First Bulgarian Empire. The title "Tsar" is a representation of Rome's successors and a monarch's imperial aspirations in relation to the concept of the Third Rome.
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