There are many ways to imprint yourself in the memory of posterity. So we still know today of the existence of some ancient peoples who disappeared from the earthly stage hundreds of years ago. In addition to historical records and rediscovered everyday objects, it is above all the preserved buildings that give us a lively insight into the everyday reality of our distant ancestors. However, some of the buildings from that time are in such amazing condition that we wonder how the workers were even able to accomplish such a feat of construction. With their equally complex and precise elaboration, at first glance it seems difficult to imagine that the massive structures were created using the simplest of tools. In fact, for some people, this idea seems so far-fetched that they look for other explanations. A controversial thesis is that the ancients possessed advanced technologies that may have been revealed to them by extraterrestrial visitors! We will now show you which ancient buildings fuel the corresponding theories!