True or False: The early Grand Princes of Kiev became Roman Catholics

False

Explanation:

The Early Grand Princes of Kev did not become Roman Catholics. One of the Early Grand Princes of Kev known as Vladimir Sviatoslavich (Vladimir the great) was the first Prince to be become a Christian.

He was an Orthodox Christian i. e and Orthodox Catholic and not a Roman Catholic. He practised Byzantine Christianity.

As an Orthodox Christian or Catholic, they spoke Greek and the Priests were allowed to get married.