Galileo and other early inventors were bitter rivals for the secrets of optics. Lots of deception, aggrandizement, hard feelings and litigation.
Ancient tales of magical mirrors play a part in the tale of telescopy. We have numerous accounts of, say, a man atop the highest tower in Alexandria, who, with the aid of a magical glass, can see all that happens in London. These tall tales go on and on -- magical mirrors and lenses which see distant sights, peers around corners, see through walls ... mostly far-fetched, yet meaningful in an age of discovery.
I read a book on the topic -- the title escapes me, sorry -- thin, scholarly study. Good stuff, recommended.