Multi-Purpose Nautical Astronavigational Instrument (comprising universal mechanical sun-dial) ,   1697 Italy

Multi-Purpose Nautical Astronavigational Instrument (comprising universal mechanical sun-dial) , 1697 Italy

Astrolabe, magnificent computer of the Ancients—an instrument used to make astronomical measurements, before the development of the sextant

Astrolabe, magnificent computer of the Ancients—an instrument used to make astronomical measurements, before the development of the sextant

super-secret passage bookshelf

10 Drool-Worthy Secret Passage Bookshelves

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