Easy Country Puzzle - Europe (with Map!)

Oh no! Europe has been split up into 40 pieces, cut along every 10th latitude and longitude. To turn one piece green, guess one of the three biggest cities in it.
The square needs to have at least one urban area with 100,000 inhabitants. If not, they are already turned grey
Some pieces don't have land on them - you don't have to guess them, of course
The population indicates the urban area of the three biggest cities
Quiz by Gassu
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Last updated: November 8, 2018
First submittedNovember 8, 2018
Times taken333
Rating4.50
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Population
Cities
26.0 m
Moscow / Saint Petersburg / Kiev
21.2 m
Paris / Milan / Barcelona
20.7 m
London / Birmingham / Manchester
18.4 m
Istanbul / Bucharest / Belgrade
11.4 m
Cologne / Frankfurt / Rotterdam
10.4 m
Naples / Rome / Budapest
9.83 m
Berlin / Hamburg / Katowice
8.55 m
Madrid / Porto / Bordeaux
5.64 m
Lisbon / Valencia / Seville
4.94 m
Warsaw / Minsk / Riga
4.62 m
Nizhny Novgorod / Yekaterinburg / Kazan
Population
Cities
4.10 m
Donetsk / Dnipro / Rostov-on-Don
3.52 m
Athens / Patras / Heraklion
2.14 m
Volgograd / Makhachkala / Astrakhan
1.87 m
Helsinki /Tampere / Turku
1.21 m
Palermo / Catania / Messina
1.01 m
Palma / Cagliari / Ibiza
757 k
Murmansk / Petrozavodsk / Severodvinsk
692 k
Arkhangelsk / Syktyvkar / Ukhta
354 k
Bergen / Ålesund / Molde
315 k
Trondheim / Gävle / Sundsvall
241 k
Reykjavík / Keflavík / Selfoss
+1
Level 67
Nov 8, 2018
Great quiz!
+1
Level 56
Nov 8, 2018
Very nice quiz indeed, missed out on 2 squares in Russia!
+1
Level 72
Nov 8, 2018
A few thoughts:

- You might be wondering why London or Hamburg are located in one piece despite being located on a black line. I used the coordinates given by Wikipedia. These usually represent the city center. Thus, the city center of London is slightly west of the Greenwich Prime Meridian.

- JetPunk‘s Europe map doesn‘t cover all of European Russia, but in this quiz every European city is included although their actual location is not visible. Yekaterinburg for example is 60°E, but does count as "between 40 and 50", because the 50th meridian east isn‘t visible anymore

- As it’s a Swiss tradition, this prototype is trying to solve disputed areas neutrally and in a way everbody can be happy. You can decide on your own if you want to draw the broken line completely or delete it completely. (in your mind)

- Geography fans: stay tuned! An ever harder version (every 5th latitude/longitude) is coming soon!
+1
Level 56
Feb 25, 2019
archangelsk should be accepted (with a "c")