The invented language of Esperanto is more than century-old now. Combined from the vocabulary and grammar of several Indo-European languages, it was meant in the very beginning a universal communication means for a world already giving signs of communication fatigue in the late 19th century. Its creator, Ludwik Łazarz Zamenhof (1859-1917) was a Polish-Jewish ophtalmologist who had the idealistic aspiration to help people communicate regardless of their origin and education by providing an easy-to-learn language. His first attempts at creating such a language date back in 1873, when he was but a schoolboy. Nowadays, it is assumed that unlike national languages, which require an average of thousands of hours of tuition to master, Esperanto is still on the light side with only 150 hours of study to acquire the basics and be fluent in everyday topics.
It is no wonder that Esperanto and its ideal fascinated from the very beginning. The heritage of Zamenhof and of Esperanto was very frequently featured on stamps.
Austria issued two early examples of Esperanto-themed stamps, in 1947 and 1953 respectively.
They commemorate the Austrian Congress of 1947 and 50 years of Esperanto language culture in Austria.