I'm a member of many Facebook pages and most of them are about art and mainly photography. I was curious which ones do best in Sweden were I'm currently living. There are many Facebook page rankings, but for Sweden I found this one to be most reliable:
fbrankingse.com. I would say I was eepecting more photography pages to be there, but still it's not too bad. I think most of them are on the French Facebook page ranking, because of Henri Cartier Bresson, Eduard Boubat and all the humanist photographers.
fbrankingfr.com