Original version created by Wikimedia Commons user NikNaks (https://commons.wikimedia.org/wiki/User:NikNaks) based on the files https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe_1929-1938.svg (by Wikimedia Commons user Alphathon https://commons.wikimedia.org/wiki/User:Alphathon), https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe_1956-1990.svg (by Wikimedia Commons user Alphathon https://commons.wikimedia.org/wiki/User:Alphathon), and https://commons.wikimedia.org/wiki/File:Blank_political_map_Europe_in_2006_WF.svg by various authors (see file page for details).

Current version created by Wikimedia Commons user Alphathon (https://commons.wikimedia.org/wiki/User:Alphathon) based on the files https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe_1929-1938.svg (same author), https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe_1956-1990.svg (same author), and https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe.svg (various authors; see metadata below).

Released under CreativeCommons Attribution ShareAlike 3.0 Unported (http://creativecommons.org/licenses/by-sa/3.0/).

The maps https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe_1956-1990.svg and https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe_1929-1938.svg are based on https://commons.wikimedia.org/wiki/File:Blank_map_of_Europe.svg. The metadata description for that file is contained below.

A blank Map of Europe. Every country has an id which is its ISO-3166-1-ALPHA2 code in lower case.
Members of the EU have a class="eu", countries in europe (which I found turkey to be but russia not) have a class="europe".
Certain countries are further subdivided the United Kingdom has gb-gbn for Great Britain and gb-nir for Northern Ireland. Russia is divided into ru-kgd for the Kaliningrad Oblast and ru-main for the Main body of Russia. There is the additional grouping #xb for the "British Islands" (the UK with its Crown Dependencies - Jersey, Guernsey and the Isle of Man)

Contributors.
Original Image: (http://commons.wikimedia.org/wiki/Image:Europe_countries.svg) Júlio Reis (http://commons.wikimedia.org/wiki/User:Tintazul).
Recolouring and tagging with country codes: Marian "maix" Sigler (http://commons.wikimedia.org/wiki/User:Maix)
Improved geographical features: http://commons.wikimedia.org/wiki/User:W!B:
Updated to reflect dissolution of Serbia & Montenegro: http://commons.wikimedia.org/wiki/User:Zirland
Updated to include British Crown Dependencies as seperate entities and regroup them as "British Islands", with some simplifications to the XML and CSS: James Hardy (http://commons.wikimedia.org/wiki/User:MrWeeble)