150th anniversary of Ludwik Lejzer Zamenhof (15-12-2009)

Ludwik Lejzer Zamenhof, 15 December 1859–14 April  1917, usually credited as L. L. Zamenhof, was a Polish-Jewish medical doctor, inventor, and writer. He is most widely known for creating Esperanto, the most successful constructed language in the world. He grew up fascinated by the idea of a world without war and believed that this could happen with the help of a new international auxiliary language, which he first developed in 1873 while still in school.