An Archaic Greek temple dominated Corinth when Paul wrote his letters in Greek to Corinthian Christians.
Does it matter that the New Testament was written in Greek?
Yes, very much, since in order to reach new converts, the earliest Christians used Greek language and writing.
Why Greek?
Greek was the common international language for nearly a thousand years around the eastern Mediterranean Sea, including the Holy Land. (See timeline.)
So what?
Christianity used Greek written genres (See types of literature) and classical art styles in ways that: