Can you divide one of the five main periods (choose one you prefer) into two parts? Explain the suggested division (briefly, in about 100 and no more than 200 words).

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I. Major periods of Russian history: Late IX c. – mid XIII c. – Early Rus’ = Kievan Rus’  mid. XIII c. – late XV c. – Mongol-Tartar Yoke (Mongol invasion of Kievan Rus’) late XV – late XVII – Moscovite Rus’ (Grand Duchy of Moscow+ Tsardom of Russia) Late XVII c. – 1917 – Peter I the Great & The Russian Empire Since 1917 – ‘Soviet’. Soviet Union&(since 1991) ‘post-Soviet’ second question: Why did Pushkin call St Petersburg “A window to Europe” (in some other translations: “a window at Europe,” “a door to Europe,” “a Window to the West,”  etc.)?