Проверьте ошибки в вопросах: 1. Who married the niece of the last Byzantine emperor?2.who was the first leader in Russia?3.In

1. Who married the niece of the last Byzantine emperor?

2. Who was the first leader in Russia?

3. What year did Ivan come to the throne as a ruler?

4. Who called himself as the ruler of all Russia?

5. What year did Prince Vladimir convert the Kievan Rus to Christianity?