"The province of Achaia, formed after the incorporation of Greece in the Roman Empire (146 BCE), covered the area of the Peloponnese and southern mainland Greece. . . ."
David W. J. Gill, "Achaia," in The new interpreter's dictionary of the Bible, ed. Katharine Doob Sakenfeld (Nashville, TN: Abingdon Press, 2006), vol. 1, pp. 30-31.
