2013 Event The famous painting, 'Liberty Leading the People' by Eugene Delacroix, commemorating the July Revolution of 1830 is vandalized while on loan to the Louvre-Lenz museum in Lens, France 1952 Event 1st plastic lens for cataract patients fitted (Philadelphia) 1948 Event Dr. Frank G Back (New York City) patents lens to provide zoom effects 1947 Event 1st telescope lens 200" (508 cm) in diameter completed 1947 Event Lens to provide zoom effects demonstrated in New York City 1936 Event 200" telescope lens shipped, Corning Glass Works, New York-Cal Tech 1897 Death Alvin Graham Clark, dies 3 weeks after 1st use of Yerkes 40" lens 1706 Birthday John Dollond, owner of 1st patent for achromatic lens 1648 Event Battle of Lens: French duke d'Enghien defeats Spaniards
