Volapük (; , "Language of the World", or lit. "World Speak") is a constructed language created between 1879 and 1880 by Johann Martin Schleyer, a Catholic priest in Baden, Germany, who believed that God had told him in a dream to create an international language. Notable as the first major constructed international auxiliary language, the grammar comes from European languages and the vocabulary mostly from English (with some German and French). However, the roots are often distorted beyond recognition. Volapük conventions took place in 1884 (Friedrichshafen), 1887 (Munich) and 1889 (Paris). The first two conventions used German, and the last conference used only Volapük. By 1889, there were an estimated 283 clubs, 25 periodicals in or about Volapük, and 316 textbooks in 25 languages; at that time the language claimed nearly a million adherents. However, Volapük was largely displaced between the late 19th and early 20th century by Esperanto. History Schleyer first published a sketch of Volapük in May 1879 in Sionsharfe, a Catholic poetry magazine of which he was editor. This was followed in 1880 by a full-length book in German. Schleyer himself did not write books on Volapük in other languages, but other authors soon did. André Cherpillod writes of the third Volapük convention, The Dutch cryptographer Auguste Kerckhoffs was for a number of years Director of the Academy of Volapük, and introduced the movement to several countries. The French Association for the Propagation of Volapük was authorized on 8 April 1886, with A. Lourdelet as president and a central committee that included the deputy Edgar Raoul-Duval. However, tensions arose between Kerckhoffs and others in the Academy, who wanted reforms made to the language, and Schleyer, who insisted strongly on retaining his proprietary rights. This led to schism, with much of the Academy abandoning Schleyer's Volapük in favor of Idiom Neutral and other new constructed language projects. Another reason for the decline of Volapük may have been the rise of Esperanto. In 1887 the first Esperanto book (Unua Libro) was published. Many Volapük clubs became Esperanto clubs. By 1890 the movement was in disarray, with violent arguments among the members. Schleyer resigned from the Volapük Academy and created a rival academy. Derived languages such as Nal Bino, Balta, Bopal, Spelin, Dil and Orba were invented and quickly forgotten. In the 1920s, Arie de Jong, with the consent of the leaders of the small remnant of Volapük speakers, made