Was Konstantin Pavlovich ever an Emperor of Russia?
No, he never was
Yes, for a few days
Yes, for several years
Yes, but only briefly
Answer
No, Konstantin Pavlovich never became Emperor of Russia. He was the second son of Tsar Paul I and succeeded his elder brother, Alexander I, as ruler of Poland in 1825. However, he renounced the Russian throne in favor of his younger brother, Nicholas I, due to his morganatic marriage to a Polish countess.
Dive into History: The Life of Grand Duke Konstantin Pavlovich of Russia Quiz