EARTH MYSTERY: Modern technology in ancient times???

Many archeological discoveries around the world, have details that suggests a baffling similarity with modern technologies and devices reported by ancient civilizations, MAINLY the ones used by some "gods" or "deities". Some details of sculptures are so scandalous that many non-orthodox researchers and scientists, seriously consider that indeed did exist one or more advanced civilizations in remote times. But we got three issues here: Why these possible technologies were related ONLY to gods and not common people?? Who were these "gods"?? What happened with them??