In contemporary times, robotics stands as one of the most prominent fields of scientific and technological advancement. What is lesser known, however, is that the title “Father of Robotics” is attributed by many to a Muslim scientist—Ismail ibn al-Razzaz al-Jazari (AD 1136–1206). Born in Upper Mesopotamia, Al-Jazari displayed an early passion for mechanics and engineering. By the time of his birth, many ancient Greek texts on mechanics had already been translated into Arabic, including Euclid’s On Light and Weight, Archimedes’ Hydraulics, and Ahrene’s On the Lifting of Heavy Weights. These works, along with the research of earlier Arabic scholars, provided the foundation upon which Al-Jazari would build his pioneering inventions.

His journey into mechanical innovation was neither brief nor superficial. He spent years studying and experimenting, beginning with the creation of simple mechanical devices such as toys for children and household tools to assist women in their daily chores. His skill and ingenuity did not go unnoticed. His fame spread far and wide until it reached the ears of Sultan Nasir al-Din, who summoned him to the royal court in Diyarbakir (modern-day Turkey). It was there, over the course of twenty-five years, that Al-Jazari conducted his most profound research and constructed some of the most astonishing mechanical inventions of his time.

Among his many remarkable works, his most significant literary contribution was Kitab fi Ma‘rifat al-Hiyal al-Handasiyya (The Book of Knowledge of Ingenious Mechanical Devices). This book detailed over one hundred mechanical devices, meticulously explaining their design, function, and construction, often accompanied by intricate illustrations. Even today, this text continues to be published in multiple languages, including English. Al-Jazari begins his work by expressing gratitude to Allah for granting him the ability to study technology. He acknowledges the extensive scholarship of earlier Islamic thinkers and explains that his own research builds upon and surpasses those foundations.

The book is organized into six main sections, the first of which is dedicated to the design and construction of water clocks. His research in this area is astonishingly precise, divided into ten subcategories: an introduction to water clocks and their functioning, the design of water reservoirs, the regulation of water flow, the integration of various mechanical components, the mechanism for water output, the assembly of the clock, the calibration of its movement, the use of trumpets in timekeeping, the positioning of the instrument in relation to celestial bodies such as the sun and moon, and finally, the synchronization of the device with astronomical observations. Across forty pages, Al-Jazari details the sophisticated engineering principles behind these water clocks, incorporating detailed diagrams that illustrate every step of their construction.

Subsequent chapters describe other hydraulic inventions, such as a water-dispensing device mounted on an elephant, a peacock-shaped water dispenser, and automated irrigation systems. These inventions were revolutionary, demonstrating an advanced understanding of fluid dynamics and mechanics that modern researchers continue to admire. The sophistication of his devices was so remarkable that even contemporary scholars in robotics and engineering regard them as masterpieces of medieval technological ingenuity.

Al-Jazari’s work was later translated into English by the British engineer and historian Donald R. Hill. In the introduction to his translation, Hill described his journey of studying Persian and Chinese manuscripts to understand the broader context of Al-Jazari’s work. He admitted that reading Al-Jazari’s writings made him realize the limitations of his own knowledge.

Centuries before Leonardo da Vinci envisioned automata and robotic mechanisms, Al-Jazari had already constructed automated devices. He was the first to invent the crankshaft, a fundamental component in modern engines, which he initially designed for water-lifting machines. It was not until 1948 that the term cybernetics was widely adopted by Norbert Wiener, yet the earliest observations on automated mechanical control systems had been made by Al-Jazari some eight hundred years earlier.

American historian George Sarton described Al-Jazari’s contributions as some of the most comprehensive works ever written on technology. He emphasized that Al-Jazari’s inventions emerged during the height of the Islamic intellectual and scientific renaissance, reflecting the peak of medieval technological advancement.

 The Contributions of the Banu Musa Brothers

While Al-Jazari is widely celebrated, he was not alone in advancing the field of mechanical engineering. The ninth century saw another remarkable contribution to technology from three brothers known collectively as the Banu Musa—Muhammad, Ahmad, and al-Hasan. These scholars played a crucial role in the development of modern mechanical engineering, drawing from both Greek scientific texts and their own innovative experiments.

Their father, Musa ibn Shakir, was a renowned astronomer and mathematician known as al-Munajjim (the Stargazer). After his passing, the Abbasid Caliph al-Ma’mun recognized the intellectual potential of his sons and invited them to the royal court, where they were granted access to extensive scientific resources. Once living in poverty, the Banu Musa brothers now had the means to dedicate their lives to research and innovation.

Excelling in geometry and mechanical design, they invested their wealth into knowledge acquisition. Muhammad, the eldest, traveled to Byzantine lands (modern-day Istanbul) in search of Greek manuscripts, accompanied by the esteemed translator Thabit ibn Qurra. They funded large-scale translation projects in Baghdad, ensuring that Greek scientific texts were made available in Arabic.

Beyond their contributions to engineering, the Banu Musa brothers were also politically engaged. According to historian Donald R. Hill, they actively supported the Abbasid Caliphs in navigating political crises. One of their most important scientific endeavors, commissioned by Caliph al-Ma’mun, was the measurement of the Earth’s surface. Setting out from Iran’s Al-Sanjar region, they used trigonometric calculations to estimate the Earth’s circumference, verifying earlier measurements recorded by Islamic scholars. Their findings confirmed that ancient calculations were remarkably accurate.

The Banu Musa brothers authored at least twenty major scientific works, as documented by Ibn al-Nadim in his Kitab al-Fihrist. Some of their most important books covered topics such as the design of steel yard balances, the movement of celestial spheres, the principles of geometric shapes, and the origins of the universe. However, their most significant contribution remains Kitab al-Hiyal (The Book of Ingenious Devices), in which they detailed one hundred mechanical inventions. This text provided thorough descriptions, including the design, functionality, and assembly of each device, and was accompanied by detailed illustrations.

Recognizing its continued relevance in the modern era, British engineer and historian Donald R. Hill translated this work into English, bringing its insights to a contemporary audience.

By the 12th century, Kitab al-Hiyal had already gained widespread fame. The Egyptian historian al-Qifti described it as an extraordinary and widely celebrated book. In the 13th century, the historian Abu Bakr ibn Khalikan, writing in Damascus, noted that he had studied the book in its entirety and regarded it as the most exceptional work on mechanical engineering available at the time.

The significance of the Banu Musa brothers lies not only in their translation of Greek scientific works but also in their ability to move beyond these foundations, identifying flaws in earlier theories and designing entirely new mechanical devices. They built upon the discoveries of ancient Greek thinkers such as Hero of Alexandria, Ptolemy, and Pappus, but their inventions were original and groundbreaking. Ahmad, the most passionate about technology among the three brothers, is believed to have led much of the research and authored the majority of their works.

Their book described a range of inventions, including laboratory measuring devices such as beakers, water-dispensing pitchers (ibriq), underground water pipes for fluid distribution, specialized drinking vessels for animals, and automatic heating systems. Many of these devices operated on automated mechanisms, significantly reducing manual labor and revolutionizing agriculture.

The Lasting Influence of Islamic Mechanical Engineering

The contributions of Al-Jazari and the Banu Musa brothers exemplify the remarkable achievements of Islamic mechanical engineering. Their work laid the groundwork for modern automation, robotics, and hydraulics. Al-Jazari’s pioneering use of the crankshaft became fundamental to modern engines, while the Banu Musa brothers’ advancements in mechanics and engineering provided a scientific foundation for subsequent developments in automation.

Their inventions and writings, once celebrated in medieval Islamic civilization, continue to be studied by engineers and historians today. These scholars transformed the study of mechanics into a precise and systematic discipline, demonstrating that the technological innovations of the Islamic Golden Age were far ahead of their time.