Isanbul was called Constantinople in the Byzantine times.
yes. Istanbul is city in Modern Turkey and Constantinople is its old name which was used in Byzantine times. the song that you mention is "Istanbul not Constantinople" by "They might be giants". it was so popular in 50s.
A ancient Greek mythical beast.
During the Roman empire, Istanbul's name was at first Byzantium, then a new city was built on that site and called Constantinople. Its name later reverted to Byzantium.
In the Ancient Greek times in a place called Greece.
Novels or in Greek times they were called "Epics"
The Roman and Greek citizenship influenced the development of modern democracies.in Europe and the US.
the middle ages
It literally means city. In modern times it has come to refer to the ancient Greek city-states.