how-did-peter-i-become-the-emperor-of-russia-and-why-is-he-known-as-the-great-and-how-did-catherine-ii-become-the-empress-of-russia-and-why-is-she-known-as-the-great

How did Peter I become the emperor of Russia and why is he known as “the Great”?

How did Catherine II become the Empress of Russia and why is she known as “the Great”?