Where can I get licensed pictures for websites?

Question

css

I am making a website for a customer from Germany. They have problems with the authorship of pictures, you need to take only with a free license.
Where can I get such pictures, can there be storage facilities?
And how is the authorship indicated on the site itself? Is it enough to indicate authorship in the signature or do I need to display it separately somewhere?

Answer 1

What free stocks do you use to find icons, photos, and interface elements?