This is a fairly interesting article I thought I'd share in lieu of AcaDec and our study of men and, er, their big telescopes.
Kepler's design wasn't built until much later. The first reference to such an instrument appears in 1631. But here's a mystery: Molaro and Selvelli speculate that a telescope in "The Allegory of Sight," a collaboration between Brueghel and Pierre Paul Rubens dating from 1617, is actually Keplerian.
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