Challenge page : http://www.ancientsocieties.com/poster-art/
There is no Challenge text, but a picture of an Ashanti Tribal Wood Mask (see other masks).
We can see 25 triangles around the mask… Quite like the 26 letters of the alphabet.
Some triangles are colored. They show us 5 letters : A, F, I, O and S.
These letters are an anagram of our answer : SOFIA
The solution page is http://stl.la/sofia, this page is redirected to http://www.ancientsocieties.com/whats-new-in-ancient-history/