Eunuchs are men who have been castrated, meaning their testicles were surgically removed or destroyed. The word comes from the Greek “eunoukhos,” literally meaning “guard of the bed,” reflecting one of their earliest roles as protectors of royal harems. For thousands of years, eunuchs served as trusted servants, political advisors, military commanders, and religious figures across civilizations from China to Rome to the Ottoman Empire. Their history spans at least 3,000 years, and communities connected to this tradition still exist today.
Origins and Early Roles
From remote antiquity, eunuchs were employed in the Middle East and China in two main functions: as guards and servants in women’s quarters, and as chamberlains to kings. Rulers with large harems considered eunuchs the most suitable guards for their wives and concubines, since castrated men posed no sexual threat. But this close proximity to power gave eunuchs something far more valuable than a job title. Their confidential position in royal households frequently allowed them to become the most trusted voices in the room.
Some rose to become bodyguards, confidential advisors, ministers, generals, and even admirals. In Persia, eunuchs served as court advisers under the Achaemenid dynasty as early as 559 BC. Roman emperors including Claudius, Nero, and Titus relied on eunuch officials, a practice that continued through the Byzantine Empire and into the Ottoman period. As a class, eunuch political advisors only disappeared with the fall of the Ottoman Empire in the early 20th century.
Eunuchs in China
China has the longest continuous history of eunuch involvement in government. Eunuchs functioned as political advisors to Chinese emperors beginning in the Chou period (roughly 1122 to 221 BC) and continued under the Han, Tang, Ming, and Sung dynasties, persisting almost until the end of the imperial regime in the early 1900s. At times, palace eunuchs became more powerful than the emperor himself and effectively ruled China. Their influence grew because they lived inside the palace, had daily access to the ruler, and weren’t seen as competitors for the throne since they couldn’t produce heirs.
Power in the Byzantine Empire
Byzantine eunuchs held an unusually wide range of roles compared to other empires. They served as prime ministers, generals, governors, and even patriarchs of Constantinople, the highest religious position in the Eastern Christian church. Families sometimes chose castration for their sons specifically to improve their career prospects, since eunuchs had access to positions that were difficult to reach otherwise.
The Byzantine church officially opposed the practice of castration, yet eunuchs thrived in religious life. They sang in church choirs (valued for their distinctive voices), and many of the patriarchs of Constantinople during Byzantine times were eunuchs. This tension between official disapproval and practical acceptance defined much of the eunuch experience in Byzantine society.
What Castration Did to the Body
The physical effects of castration depended heavily on whether it happened before or after puberty. The testicles produce nearly all of the body’s testosterone, so removing them before puberty meant a boy never went through typical male development. Research on the role of testosterone in growth confirms that its absence during puberty delays and alters the development of bones, including facial structure. Prepubertal eunuchs typically grew taller than average (because the growth plates in their bones stayed open longer), developed no facial hair, retained higher-pitched voices, and accumulated fat in patterns more typical of female bodies.
Men castrated after puberty experienced different changes. They had already developed masculine features like a deeper voice, facial hair, and broader shoulders, and while some of these traits softened over time, many remained. The most immediate change was a loss of fertility and a gradual decline in muscle mass and sex drive.
Methods of Castration
Historical castration took two general forms. The more common method involved removing only the testicles, which eliminated testosterone production while leaving the rest of the anatomy intact. A more radical procedure, practiced in some traditions (notably in China and parts of the Ottoman Empire), removed both the testicles and the penis entirely. This second method carried a much higher risk of death from bleeding and infection, and survivors often faced lifelong difficulties with urination. Both methods were performed without anesthesia for most of history, and mortality rates were significant, particularly for the more extreme procedure.
Eunuchs Lived Significantly Longer
One of the most striking findings about eunuchs comes from a study of Korean court eunuchs during the Chosun dynasty. Researchers examined genealogical records and found that 81 eunuchs lived an average of 70 years, which was 14 to 19 years longer than non-castrated men of similar socioeconomic status. Three of the eunuchs lived past 100. This is a remarkable gap, and it aligns with broader patterns seen in biology: across many animal species, males that are castrated tend to outlive intact males. The leading explanation points to testosterone, which boosts muscle and aggression but also appears to suppress immune function and promote cardiovascular risk over a lifetime.
Eunuchs in Religious Traditions
Eunuchs appear in multiple religious texts and traditions. In the Hebrew Bible, eunuchs are mentioned as court officials, and the book of Isaiah contains a passage promising that faithful eunuchs will receive “a name better than sons and daughters.” In the New Testament, Jesus describes three types of eunuchs: those born that way, those made eunuchs by others, and those who “made themselves eunuchs for the sake of the kingdom of heaven.” Early Christian theologians debated whether this passage was metaphorical (referring to celibacy) or literal, and some early Christians, most famously the theologian Origen, reportedly castrated themselves as an act of devotion.
In Islam, eunuchs served as guardians of holy sites, including the Prophet’s Mosque in Medina and the Grand Mosque in Mecca. Political eunuchs flourished across Muslim centers of power after 750 AD.
The Hijra Community in South Asia
The tradition of eunuchs never fully disappeared. In South Asia, the hijra community represents a living connection to this history, though the community is far more complex than a simple continuation of historical eunuchism. The centuries-old term “hijra” is used across India, Pakistan, and Bangladesh to describe people who may be intersex, transgender, or castrated men. The community has roots in both Hindu mythology and the Mughal imperial court, where hijras served in roles similar to eunuchs elsewhere.
Hijras are organized into about fifteen distinct groups based on physical characteristics, social identity, and other factors. Most live in tight-knit kinship groups led by a maternal figure called a “Guruma.” Bangladesh recognized hijras as a “third gender” in 2013, allowing the designation on passports and identification cards, though legal recognition has not eliminated the discrimination and social exclusion the community faces daily. India’s Supreme Court similarly recognized transgender people as a third gender in 2014.
Why Eunuchs Mattered Politically
The same trait that made eunuchs useful as harem guards made them valuable in politics: they couldn’t found dynasties. A eunuch advisor could accumulate enormous power without threatening to pass it to his children or establish a rival family line. For rulers surrounded by ambitious nobles, this made eunuchs uniquely trustworthy. They owed everything to the ruler who elevated them and had no biological legacy to protect.
This dynamic repeated across cultures separated by thousands of miles. In China, Byzantium, Persia, and the Ottoman Empire, eunuchs rose to positions that would have been unthinkable for other outsiders. But this arrangement also bred resentment. Court historians, almost always non-eunuchs, frequently portrayed eunuchs as corrupt, scheming, or unnatural. Much of what survives in the historical record about eunuchs was written by people who resented their influence, which means the picture we have is likely skewed toward the negative.