The medieval Islamic world wasn’t just ahead in literacy and urbanization—it also built one of history’s most sophisticated spy networks. From mail carriers who doubled as informants to queens and singing-girls gathering secrets, espionage was woven into the fabric of power.
By Cait Stevenson
Post-classical Europe didn’t get its first standing mail delivery network until the very end of the fifteenth century, and even that was a false start before Charles V reinstituted it some twenty-five years later. So, even though the medieval Islamic world was always more literate and urbanized, it might still be surprising to learn that establishing a postal service was one of the first priorities of the Umayyad Caliphate in the seventh century. Of course, the German system emerged because princes had stopped attending Reichstag meetings and still wanted to know what was going on (in… exhausting… detail). For the Umayyads and their successors, however, formal letter delivery and deliverers had a purpose beyond correspondence. The “carrier of letters,” or sahib al-barid, was also the sahib al-khabar—the carrier of secrets. The mailman, in other words, was a spy.
It wasn’t just the mailman, either. If we can believe the chroniclers, dynasties and empires from the Rashidun Caliphate to the heyday of the Turks secured their internal and external power through a basic principle: “The ruler ought to plant spies on his subjects and associates; eyes that spy on their whereabouts, their news—especially if there is any doubt about them.”
Spies were so zealous and persistent that the Seljuq Turks had to regulate boundaries for their own agents (don’t unveil women or break down locked doors), and letters of advice warn anxiously against acting against an ally on the word of a spy—at least until you are really, really sure. By the end of the seventh century, the expectation of espionage was so ubiquitous in Basra that groups of people would simply turn away any unknown face.
With both suspicion of and need for secret agents so high, Muslim rulers found themselves turning to the ultimate undercover operatives: women. Legends from the earliest days of Islam describe the special use of women messengers to convey sensitive intelligence from one camp to another. After camps became cities and tents became palaces, illustrious ambassadors were charmed by the songs of the qiyan (singing-girl slaves), while the women assigned to clean up in the background listened for any whispered words. And why stop at slaves? Reportedly, Saladin (Salah ad-Din) recruited the Queen of Antioch to his intelligence service in the 1180s.
Delia Cortese credits Caliph al-Hakim bi-Amr Allah with reviving the use of women spies among the Fatimids to an impressive extent. Al-Hakim recognized that women were not just useful for acquiring knowledge, but for having it in the first place. He delegated elderly women to subtly extract information from their female friends during seemingly ordinary social visits. Not to be outdone, his half-sister Sitt al-Mulk organized her own spy network.
And sometimes, you didn’t just need eavesdroppers—you needed people who, well, built their own eaves. As a Fatimid vizier in the middle of a colossal struggle for power, al-Afdal Shahanshah brought in the heavy hitters: his mother. She masqueraded as the mother of one of his soldiers, moving around the court and city, spouting tales of the horrors of official service. She lured out supporters of the rebels and reported every word back to her son.
When we talk about spies in the Middle Ages, it’s easy to envision soldiers sneaking into enemy camps or royal messengers with a hidden agenda. But to understand the full power of information for medieval rulers, we have to look through their eyes—and value the spies they valued. All of them.
The medieval Islamic world wasn’t just ahead in literacy and urbanization—it also built one of history’s most sophisticated spy networks. From mail carriers who doubled as informants to queens and singing-girls gathering secrets, espionage was woven into the fabric of power.
By Cait Stevenson
Post-classical Europe didn’t get its first standing mail delivery network until the very end of the fifteenth century, and even that was a false start before Charles V reinstituted it some twenty-five years later. So, even though the medieval Islamic world was always more literate and urbanized, it might still be surprising to learn that establishing a postal service was one of the first priorities of the Umayyad Caliphate in the seventh century. Of course, the German system emerged because princes had stopped attending Reichstag meetings and still wanted to know what was going on (in… exhausting… detail). For the Umayyads and their successors, however, formal letter delivery and deliverers had a purpose beyond correspondence. The “carrier of letters,” or sahib al-barid, was also the sahib al-khabar—the carrier of secrets. The mailman, in other words, was a spy.
It wasn’t just the mailman, either. If we can believe the chroniclers, dynasties and empires from the Rashidun Caliphate to the heyday of the Turks secured their internal and external power through a basic principle: “The ruler ought to plant spies on his subjects and associates; eyes that spy on their whereabouts, their news—especially if there is any doubt about them.”
Spies were so zealous and persistent that the Seljuq Turks had to regulate boundaries for their own agents (don’t unveil women or break down locked doors), and letters of advice warn anxiously against acting against an ally on the word of a spy—at least until you are really, really sure. By the end of the seventh century, the expectation of espionage was so ubiquitous in Basra that groups of people would simply turn away any unknown face.
With both suspicion of and need for secret agents so high, Muslim rulers found themselves turning to the ultimate undercover operatives: women. Legends from the earliest days of Islam describe the special use of women messengers to convey sensitive intelligence from one camp to another. After camps became cities and tents became palaces, illustrious ambassadors were charmed by the songs of the qiyan (singing-girl slaves), while the women assigned to clean up in the background listened for any whispered words. And why stop at slaves? Reportedly, Saladin (Salah ad-Din) recruited the Queen of Antioch to his intelligence service in the 1180s.
Delia Cortese credits Caliph al-Hakim bi-Amr Allah with reviving the use of women spies among the Fatimids to an impressive extent. Al-Hakim recognized that women were not just useful for acquiring knowledge, but for having it in the first place. He delegated elderly women to subtly extract information from their female friends during seemingly ordinary social visits. Not to be outdone, his half-sister Sitt al-Mulk organized her own spy network.
And sometimes, you didn’t just need eavesdroppers—you needed people who, well, built their own eaves. As a Fatimid vizier in the middle of a colossal struggle for power, al-Afdal Shahanshah brought in the heavy hitters: his mother. She masqueraded as the mother of one of his soldiers, moving around the court and city, spouting tales of the horrors of official service. She lured out supporters of the rebels and reported every word back to her son.
When we talk about spies in the Middle Ages, it’s easy to envision soldiers sneaking into enemy camps or royal messengers with a hidden agenda. But to understand the full power of information for medieval rulers, we have to look through their eyes—and value the spies they valued. All of them.
Cait Stevenson earned her PhD in medieval history from the University of Notre Dame. She is the author of How to Slay a Dragon: A Fantasy Hero’s Guide to the Real Middle Ages. You can follow her on BlueSky @anyfourcastles.bsky.social
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