Tales about Peter the Great

Andrei Konstantinovich Nartov is a Russian scientist, mechanic and sculptor, state adviser, member of the Academy of Sciences (1723-1756), inventor of a turning and engine-cutting machine with a mechanized caliper and a set of interchangeable gear wheels.
About 1718, the king sent Nartov on a trip to Prussia, Holland, France and England to improve turning art and "acquisition of knowledge in mechanics and mathematics", and upon his return from abroad he instructed him to manage his turning, which he was, Soon he expanded and replenished with new machines exported and discharged from abroad. Nartov’s relationship with Peter the Great was very close: the turner was next to the royal chambers and often served as the king