Universe in Antique Mind

Considering the most recent religion. Its message comes to human around fourteen hundred years ago. What was the size of universe and also the attitude of humans at that time. Earth was limited to a twenty million square kilometer round the Mediterranean sea with boundaries in unknown places in western sides of India Central Asia, Caucasus north and south of Mediterranean sea and somewhere in Ethiopia. During six hundred years from Jesus Christ to Mohammad, individuals from Christendom had gone to expeditions further North, East and West of Europe, converted many but not all of scattered inhabitants of those regions. Earth was a lonely place in the universe inhabited by humans who were living just few miles far from the heaven above that was like a neighbourhood filled with Deity or deities and angles and familiar phenomena. God, from heaven or Olympus or similar places, all the time was watchful of its small dominion in Levant or Hellas or small islands of Polynesia in shape of an old man or a powerful father or a parrot and in constant need of golds and sacrifice and prayers and burning scents, who was administrating those people living there with immediate contingents of angles and daemons and thunders or diseases.