The construction of the Castle began in 1358, but it remained unfinished until a renovation was completed around a hundred years later, and Da Vinci was one of several artists hired by the Duke of Milan to decorate its walls.

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Using radar, laser scanners, and other advanced technology, researchers from the Polytechnic University of Milan confirmed the existence of hidden passageways and rooms, verifying sketches that the Renaissance legend made in the 1940s.