Eight hundred years ago he designed water clocks, musical automata and pumps — with instructions to build them all.
Al-Jazari (1136–1206) was a Mesopotamian engineer at the Artuqid court in Diyarbakir whose Book of Knowledge of Ingenious Mechanical Devices, completed in 1206, described fifty machines — water clocks, musical automata, fountains and pumps — with detailed construction drawings, earning him the modern title 'father of robotics'.
Unlike most medieval inventors, he wrote for builders: each device comes with step-by-step instructions and illustrations so precise that modern engineers have reconstructed working machines from his 800-year-old diagrams. Donald Hill's 1974 English translation finally brought the book to the wider world.
Badi al-Zaman ibn al-Razzaz al-Jazari — 'the marvel of the age' — served the Artuqid Turkish dynasty in Diyarbakir, in what is now southeastern Turkey, rising to chief engineer. For decades he designed machines for the palace: devices to raise water, to mark time, to entertain guests.
In 1206 he gathered a lifetime of work into a single book, writing that he wanted his devices preserved so that others could build them after him. The surviving manuscripts are illustrated in color, each mechanism drawn with unusual care.
The most famous is the elephant clock: a water-powered timepiece in which a sinking bowl pulls ropes and levers so that, every half hour, a mechanical bird chirps and a figure strikes a cymbal. The castle clock stood eleven feet tall, with automated doors and astronomical displays.
His musical automaton — a boat carrying four mechanical musicians — could be 'programmed' with pegs to play different rhythms, an early programmable machine. His hand-washing device used a humanoid servant figure to offer soap and towels automatically.
In water-raising he was a master: his twin-cylinder pump, driven by a water wheel, used the crank mechanism to convert rotary into reciprocating motion — the earliest full working account of the crank in a machine, the ancestor of the mechanism in every car engine. His book also gives the earliest systematic description of a camshaft used as a controller.
Scholars debate whether he invented the crank or the camshaft outright; what is certain is that his is the earliest complete, buildable description of both at work. His influence on European clockmaking and automata is widely acknowledged.
Working replicas of his machines stand in museums from Istanbul to London — proof that medieval Islamic engineering, eight centuries ago, could design, document and deliver machines Europe would not match for hundreds of years.
