This Month in Astronomical History: The Invention of the Telescope | American Astronomical Society
Antique 24" 3 Draw Brass and Leather Spyglass Telescope Made In France | eBay
History Of The Telescope | The First Famous Telescope Discoveries
History of the telescope - Wikipedia
Home Made Telescopes
Galileo and the Telescope | Modeling the Cosmos | Articles and Essays | Finding Our Place in the Cosmos: From Galileo to Sagan and Beyond | Digital Collections | Library of Congress