Keywords: Constantijn Huygens, Jr portrait.png Dutch statesman and telescope maker He was the son of the poet and states-man Constantijn Huygens and the older brother of Christiaan Huygens <ref>http //www dcs warwick ac uk/bshm/zingaz/LondonPeopleH html British Society for the History of Mathematics</ref> Image from http //sci esa int/science-e/www/object/doc cfm fobjectid 35113 http //sci esa int/science-e/www/object/doc cfm fobjectid 35113 1685 self portrait Reflist PD-old-100 Original upload log en wikipedia terraflorin en wikipedia Constantijn_Huygens 2C_Jr_portrait png 2009-06-09 21 00 Fountains of Bryn Mawr 371×480× 361817 bytes <nowiki>Constantijn Huygens Jr 1628-1697 was a Dutch statesman and telescope maker He was the son of the poet and states-man Constantijn Huygens and the older brother of Christiaan Huygens<ref>http //ww</nowiki> DEFAULTSORT Huygens Constantijn Jr 1628 births 1697 deaths Astronomers from the Netherlands Inventors from the Netherlands People of The Hague |