1) Galleries
2) Auction houses
3) Dealers
4) Fairs
5) Festivals
6) Collections/Foundations/Estates/Museums

Baltic States
Benelux: Belgium, Luxemburg, Netherlands
Germany
France
Italy
Austria
Poland
Russia, Kaukasus, Eastern Europe
Switzerland
Skandinavia
Spain
South- and Southeast Europe, Turkey
Czech Republic
United Kingdom and Northern Ireland

7) Professional Education
8) Accademic Institutions