The existence of eunuchs was one of the defining features of the Byzantine Empire. Covering the whole span of the history of the empire, from the fourth to the fifteenth centuries AD, Shaun Tougher presents a comprehensive survey of the history and roles of eunuchs, making use of extensive comparative material, such as from China, Persia and the Ottoman Empire, as well as about castrato singers of the eighteenth century of Enlightenment Europe, and self-castrating religious devotees such as the Galli of ancient Rome, early Christians, the Skoptsy of Russia and the Hijras of India.

The existence of eunuchs was one of the defining features of the Byzantine Empire. Covering the whole span of the history of the empire, from the fourth to the fifteenth centuries AD, Shaun Tougher presents a comprehensive survey of the history and roles of eunuchs, making use of extensive comparative material, such as from China, Persia and the Ottoman Empire, as well as about castrato singers of the eighteenth century of Enlightenment Europe, and self-castrating religious devotees such as the Galli of ancient Rome, early Christians, the Skoptsy of Russia and the Hijras of India.