Sort:  

when u reverse check . Not all photos that you find in Wikipedia are royalty free. :)

suggestions for royalty free photos: pixabay.com , pexels.com, search.creativecommons.org. When you google images make sure you you click on "labeled for reuse".

P.S: i have no intention to ruin the post. if you change the photos, i would like to promote it :)

Ok. I edited it, I added the links.