Europeana, oder: die Kartierung der Kultur - Moritz Hoffmann

From Google translate:

"Europeana, or: the mapping of culture

Only once have I, in my scientific, freelance and leisure time career, worked on a project that had a picture budget. And even in this one project we could not just use what we wanted. Images are quite expensive if they are subject to the usual licensing conditions – which is often a good thing, since photographers also have to live on something, but in some cases it is also completely absurd, as in the case of picture agencies who want three-digit sums for the use of a picture, of which nothing is received by the author.

It is therefore all the more important to have access to media that are under free (e. g. Creative Commons) or no (freedom of association) licence conditions. In recent years, Google has made enormous progress in image search, which can now be filtered according to different license models. However, this is not particularly precise (e. g. it doesn’t allow filtering of Creative Commons images that can only be used in non-commercial contexts, which doesn’t apply to my blog) and it finds only a fraction of the possible media, mainly from Flickr and Wikimedia Commons."