Yes, which as far as we can tell was a purely ritual site with no signs of habitation, no burials. Even "pre-civilization" folks were capable of amazing works, but that doesn't meet the definition of a "civilization" in the classic sense. It's probably the best indication of what humans could build pre-agriculture, but everything points to it being an upper-limit.

BTW, that doesn't take anything away from the site, and in fact makes it more remarkable.