2 people found this helpful
If "classical" means that more than 70 years (*) have passed since the artist died, there are no rights to have. It's in the public domain.
If less than 70 years, the artist or his/her successors automatically hold all rights. These rights can be administered by national organizations who grant usage rights on a case-by-case basis - IOW you need to contact them.
For flat paintings there aren't any photographic copyrights. Photographer's copyright only kicks in for three-dimensional art, where the photographer is assumed to have creative influence on the finished result.
(*) Time period may vary from country to country, but for most of Europe it's 70 years.
US legislation may be slightly different.
No, its wasn't this.
I could be wrong, but I remember an email stating that they had stock images of the complete works of *insert name european art gallery here* available as stock images?
Not that I have ever heard of.