Interlinguistics of interlinguistics are, however, not so constructive, but rather descriptive, comparative, historic, sociolinguistic, or concerned with translation by humans or machines. As for Esperanto, which is the most widely used constructed interlanguage, there is a relatively abundant literature about the language itself and its philology (see Esperantology). Only a few of the many constructed languages have been applied practically to any noteworthy extent. The most prosperous were Volapük (1879, Johann Martin Schleyer), Esperanto (1887 Ludwik Lejzer Zamenhof), Latino sine flexione (1903, Giuseppe Peano), Ido (1907, Louis Couturat), Occidental-Interlingue (1922, Edgar de Wahl) and Interlingua (1951, IALA and Alexander Gode), with
Ludwik Stasiak organize a major exhibition of Polish artists in Kiev. After 1901, his interests turned from painting to literary work. He wrote historical novels, short stories and three volumes of humorous sketches, all of which proved to be very popular. He also became interested in the sculptor, Veit Stoss (Wit Stwosz), a major figure in Medieval Kraków. After extensive research, he concluded that Stoss was actually of Polish, not German origin, and wrote several works supporting that thesis. The Bochnia City Council declared 2008 to be the "Year of Ludwik Stasiak". Ludwik Stasiak Ludwik Józef Stasiak (13 August 1858, Bochnia -