Agreed, this is an article-worthy case that may have on going repurcussions for hosting PD artwork photographs for Commons.
Perhaps the first step could be an English translation of the ruling, with notes against legal terms which may be being used in a narrow legal context here, rather than using the normal plain English meaning. Aspects of the case, such as this ruling applies where the institution has photography restrictions, and that the photographs were taken by an amateur rather than the institution, are worth emphasising. Clearly this reference case does not automatically transfer risk in scenarios where those same conditions are not present.
Whether this may influence the expert legal interpretation of similar European law in other countries, is probably a hypothetical to park for the time being.
Is there going to be an appeal?
Fae