Polytechnic University of Milan - Finestre sull'Arte

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A georadar survey by the Milan Polytechnic revealed underground passages under the Castello Sforzesco

A georadar survey by the Milan Polytechnic revealed underground passages under the Castello Sforzesco

There would be "numerous underground passages under Milan's Castello Sforzesco, at what used to be the Ghirlanda, some of which could be related to secret passages of a military nature, also described in drawings by Leonardo da Vinci." Announcing the...
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