The 500 Biggest cities in Europe and Russia (the whole of russia) according to http://www.citymayors.com/features/euro_cities1.html
*The data used in this quiz do not take into account suburban settlements or other heavily populated areas outside city boundaries.
For example is Wirral near Liverpool considered a "city" for itself and not a part of Liverpool. In another example, the Fife area between Edinburgh and Dundee is also considered as a "city".
Knowledge about Russian cities is an advantage.
This will be challenging.