If you have any love of history at all do yourself a favor and check this out
Here is a very cool dynamic map of Russian territories from 1462 to 2018, truly worth clicking: Границы России 1462-2018 гг
And here is the neat accompanying video animation of progression through the years:
Dark green -- Russia proper
Light green -- Russian dependencies
Blue -- disputed
Gray -- temporarily occupied
A pair of infographics to go along with that:
Gross Russian territory over time:
Russia is smaller than at any time since 1732.
Territories gained/lost by each ruler:
Biggest gains: Mikhail Romanov & Alexey Mikhailovich (Siberia).
Biggest losers: Gorbachev, Lenin
Source: The Unz Review