The Serapeum of Saqqara was the ancient Egyptian burial place for sacred bulls of the Apis cult at Memphis. It was believed that the bulls were incarnations of the god Ptah, which would become immortal after death as Osiris-Apis, a name which evolved to Serapis in the Hellenistic period, and Userhapi in Coptic.
Over a timespan of approximately 1400 years, from the New Kingdom of Egypt to the end of the Ptolemaic Period, at least sixty Apis are attested to have been interred at the Serapeum. For the earliest burials, isolated tombs were constructed. As the cult gained importance, underground galleries were dug that connected subsequent burial chambers. Above ground, the main temple enclosure was supplemented by shrines, workshops, housing and administrative quarters.
From the Late Period onward, most Apis were buried in large sarcophagi, which weigh around 40 tonnes (88,000 lb) and have 25 t (55,000 lb) lids. They were moved with the help of winches, rollers and levers. To lower them into their final position the chambers were first filled with sand, which was then gradually removed. Only four of the 24 surviving sarcophagi are inscribed. The quality of the inscriptions varies, the ones of Amasis II were beautifully executed, whereas those on an anonymous sarcophagus were only crudely scratched on the polished surface.
The Serapeum was closed in the beginning of the Roman period, after 30 BC. In the subsequent centuries large-scale looting took place. Many of the superstructures were dismantled, the burial vaults broken into, and most of the mummified Apis and their opulent burial goods removed.
Please use your modern equipment to move this coffin(Ancient Egyptians)
Scientists around the world have tried to answer these questions:
1- How was this volume transported through the narrow passage?
2- How was the marble coffin emptied with such precision?
3- How was the place illuminated during the excavation and construction work? (There are no traces of smoke or fire to prove the use of candles for lighting)
No matter how much progress we have made, we cannot empty the marble in this way, and no equipment can transport such coffins through this passage