How could imposing buildings like the Pantheon in Rome or even the aqueducts to supply water to the Roman cities like in Aspendos or Side ever be constructed?

The Latin  word basilica, was originally used to describe a Roman  public building, usually located in the forum of a Roman town. Public basilicas begin to appear in Hellenistic cities in the 2nd century BC.

A sarcophagus is a funeral receptacle for a corpse, most commonly carved or cut from stone. The word "sarcophagus" comes from the Greek meaning "flesh", and phagein meaning "to eat", hence sarkophagus means "flesh-eating"; from the phrase lithos sarkophagus.