Anatolia, the peninsula between the Aegean and the Caucasus, roughly modern Turkey, has been for four thousand years a corridor between worlds, and its religious history is a palimpsest of the traditions that crossed it. The Hittites, who built an empire here in the second millennium BCE, left one of the ancient world's most cosmopolitan pantheons, absorbing gods from the Hattians, Hurrians, and Mesopotamians into "the thousand gods of Hatti."
Later the region gave the classical world some of its most influential cults: the great mother goddess Cybele of Phrygia, whose ecstatic worship spread to Rome; the Artemis of Ephesus, whose many-breasted image and vast temple were counted among the wonders of the world. In the first Christian centuries Anatolia was a heartland of the new faith, Paul's letters are addressed to its churches (Galatia, Ephesus, Colossae), the book of Revelation to its seven cities, and the great councils that fixed Christian doctrine met at Nicaea, Constantinople, Ephesus, and Chalcedon. Constantinople itself was for a thousand years the capital of Orthodox Christianity, until 1453. And with the Seljuk and Ottoman Turks came Islam and, at Konya, the tomb and order of the poet Rumi, a great centre of Sufi devotion. Anatolia is thus a single ground on which Hittite, Greek, Roman, Byzantine Christian, and Islamic religion were laid down in succession, each leaving its monuments among the others.