In concluding an earlier volume on the mistresses of the western Roman Empire I observed that, as the gallery of fair and frail ladies closed, we stood at the door of “the long, quaint gallery of the Byzantine Empresses.” It seemed natural and desirable to pass on to this more interesting and less familiar series of the mistresses of the eastern Roman Empire, and the present volume will therefore tell the story of the Empresses, or Queens, as they preferred to be called, who occupied the throne set up by Constantine in New Rome, or ancient Byzantium.