As we get to the year 900, you have this off-white color and you can see it is in control of both Novgorod and Kiev. As you get to 1015, it's taken even more territory and by 1113, which is near the peak of the Kievan state, you see that it has taken control of a good chunk of Eastern Europe. And as the state expands, its character changes as well. As you get to the end of the 10th century, you have a major event in one of Rurik's descendants, Vladimir, often known as Vladimir the Great. He decides to convert to Eastern Orthodox Christianity. And in a future video, I might talk about his rationales or what historians view as his rationales for conversion. And as we will see, over time, and because of not only his conversion, but essentially the conversion of the entire Kievan state, over time, especially with the eventual decline of the Byzantine Empire, what would eventually be Russia becomes a center of Eastern Orthodox Christianity.