If someone like Däniken found a 20th century catholic church in 5000 years, he would conclude that the hovering Madonna with the gloriole is a prove for some alien antigravity-technology. And that the angels with the wings were the "primitive 20th century peoples idea of space travel" or something.
I think that he's got an obsession. You've ever seen any of hos documentations? Whenever he finds anything that might be difficult to accomplish with simple technology, he states that it is impossible to accomplish it and that this is a prove for alien influence. Whenever he finds any emblem or anything that looks vaguely like it might be unrelated to primitive terran life, he interprets it to be alien influence. Thus he refuses to acknowledge that any of the early artists of mankind had any sort of fantasy. I mean, painters and sculpture-makers don't have to depict what they see. They can also invent their motives. Unknown prehistoric religions would also explain those images. His approach is totally un-scientific. He refuses to acknowledge any technically advanced accomplishment by any of the early high cultures. He only finds and shows what he is looking for and ignores the rest.
There is evidence of Stone working technology that is far more advanced than what we have today.Even with our computers/lasers and diamond tipped tools we cannot do what they apparently did with just simple metal tools.Let alone move such weights up mountains ect.
I know he does. He started the whole discussion. What do you think about it?
Erich van Däniken thinks so. http://funadvice.com/r/bpj2b654ips