After the fall of constantinople in 1453, the russian ruler ivan iii (ivan the great) began using this title, to express the view that he was the successor to the byzantine rulers. which title did he use? a) caesar b) emperor c) king d) tsar

Tsar is the correct answer.

Explanation:

Tzar is derived from the word Caesar and means a person who is considered to be claiming the same rank as a roman emperor. In Serbia it was used from 1346-1371 and in Russia from 1547-1721. It was  in use in Russia until 1917. The first ruler who was crowned Tsar of Russia was Ivan fourth. Earlier he was known as grand prince of all Russia. The last tsar was Nicholas Second

the event is known to be the soviet union.