Answer: wanted to re-create the glory of Rome in a more geographical strategic location.
Two oceanic plates converge.
The term 'island arc' is a little subjective. Volcanic arcs in general form above subduction zones either at ocean-ocean or ocean-continent convergent boundaries. Some geologists would restrict the term island arc to ocean-ocean boundaries, but in reality there is a continuum between oceanic volcanic arcs and continental volcanic arcs.
The Greek Culture made important contributions to philosophy, mathematics, astronomy and medicine. The Greeks were known for their sophisticated sculpture and architecture.
The Greek culture influenced the Roman Empire and many other civilizations.
The Byzantine Empire was influenced by the Hellenistic culture, one famous Byzantine Emperor was Justinian I.