Gods' concubine - Sara Douglass

From ancient Greece, led by Brutus, holder of the bands of gold that wield the magic of the Gods, the remnants of Troy are drawn to Albion. Landing on the shores of the land that became Britain, they began to construct a new labyrinth, a place of magic that will bring unimaginable power to those who can control it. But the temptress who lured Brutus and his people seeks to use him for her own purposes. In that she fails, for it is the bride of Brutus who dooms the completion of the Labyrinth and sends all the players in this drama into a bell of death and rebirth, until the Labyrinth is completed and the ancient magic is set free. A thousand years pass. Cathedrals rise, hymns to saints replace odes to Celtic and Greek gods. But the old magic is not yet finished with the players. New faces, new bodies, but old souls. And not all who have come back remember their part in this drama. There are kings and princes, deadly court intrigues, and a warrior across the sea who waits for his opportunity to finish what was started centuries before.