Unfortunately, the German trial court in the Reiss-Engelhorn Museum of the City of Mannheim v. Wikimedia Foundation case has ruled in favor of REM.

See https://commons.wikimedia.org/wiki/Commons:Village_pump/Copyright#Info_about_Reiss-Engelhorn_Museum_.28REM.29_of_the_City_of_Mannheim_v._Wikimedia_Foundation for details

and https://blog.wikimedia.org/2015/11/23/lawsuit-public-domain-art/ for the background