Thank you for your reply, but I was very deliberate in my terms. Christian Hellenism is the term for the universal Christian culture, a synonym of which is called Romiosini. Note that we are talking about culture. Of course, the Church is described as Catholic, which means according-to-the fullness and later took on the connotation of universal.
The Orthodox Church teaches us that the Roman Empire was established by Divine Will so that the Gospel could be spread more easily (c.f. the Hymns of Nativity). The culture of this empire was Hellenism after Alexander's conquests, which the Latins picked up and fused with their own, creating the Roman idenity. Add in Christianity and you get Christian Hellenism, or Romiosini, a way of doing things. This is the culture in which the Holy Apostles wrote scripture and preached so that they could appeal to the greatest number of people in the empire.
So to be clear: when I speak of Christian culture, I refer to Christian Hellenism, or Romiosini. When I refer to the universality of the Church in both the sense of everywhere present and according to the fullness, I say Catholic. "Christian Hellenism" is not simply a term used to substitute for Catholic culture, although in Catholic parlance, one speaks of Catholic culture. In my experience, one did not speak of Orthodox culture but rather of Roman culture and the Catholic Church as two compliments.