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Optical telegraphy dates from ancient times, in the form of hydraulic telegraphs, torches (as used by ancient Greeks) and smoke signals.

Modern design of semaphores was first foreseen by the English scientist Robert Hooke, who first gave a vivid and comprehensive outline of visual telegraphy to the Royal Society in a submission dated 1684 in which he outlined many practical details.

The first achieved optical telegraph arrived only in 1792 from the French engineer Claude Chappe and his brothers, who succeeded in covering France with a network of 556 stations stretching a total distance of 4,800 kilometres.

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