Dom y loulou, juste une petite erreur sur vos vidéos, la première et la troisième renvoient vers le même lien.

Je viens de lire ce qu’on peut trouver sur Puma Punku, on ne trouve malheureusement pas énormément de choses, et j’ai l’impression que la datation du site est assez compliquée, on ne trouve pas la même chose d’un article à l’autre.

Je vous copie ce que j’ai trouvé :

Wikipedia
Determining the age of the Pumapunku complex has been a focus of researchers since the discovery of the Tiwanaku site. According to Andean specialist, Binghamton University Anthropology professor W. H. Isbell,[1] a radiocarbon date obtained by Vranich[2] from mound fill forming the Pumapunku deposited during the oldest of three construction epochs dates the earliest construction epoch of the Pumapunku at 1510 ±25 B.P. (A.D. 440 ; calibrated, A.D. 536–600

Que signifie B.P ?
BP is a way of expressing the age of an object, as compared to BC or AD. BP is based on the disintegration of carbon. A rough formula for finding BP age from an AD is today’s year minus 1950 = a number to subtract from the AD date. For example, an object is dated at 1,000 AD. It is now 2008, therefore 2008 - 1950 = 58. The object date 1,000 AD - 58 = 942 BP. Basically BP is approximately the BC date plus 1950 and the AD date minus today’s year minus 1950.

Moi qui n’aime pas trop les maths, me voilà obligée de faire des calculs... 

Il n’y a absolument rien sur le wiki fr

Autre article.
The age of this site is thought to be around 200 B.C.E. by the archaeological majority, but Arthur Ponansky dated it to around 15,000 B.C.E. due to the believed astronomical nature by which the site was constructed. The importance of the site to the surrounding Bolivian populous can be related to that of the great pyramids of Egypt to the Egyptians.

C’est en effet mystérieux comme site !