Did you know that, Esperanto, the world’s most successful constructed language was invented / created by Ludwik Lazarus Zamenhof, a Polish Jew?

A pair of Polish postage stamps issued for the International Esperanto Congress in 1959.

Zamenhof was born in 1859 in the town of Białystok in Poland and created Esperanto while still in school. The inspiration behind his creation was his fascination with the idea of a world without war. He believed that this could happen with the help of a new international auxiliary language such as Esperanto. Zamenhof died in 1917 and is buried at Okopowa Street Jewish Cemetery in Warsaw, Poland.

Advertising for an Esperanto conference held in Sopot, Poland, in April 1973.

It is believed that between 100,000 and 900,000 people actively speak Esperanto globally.

Offsite link: Further information on the Esperanto language.