Comparison between Esperanto and Ido Ido was satisfied with it. Many former Idists, such as Otto Jespersen (who created Novial) left the movement, bleeding Ido of leaders. Of all synthetic auxiliary languages, only Esperanto and Interlingua-IL de ApI gained a sizeable following and textual corpus to this day. Esperanto is based on the "Fundamento de Esperanto" by L. L. Zamenhof; whereas the grammar of Ido is explained in the "Kompleta Gramatiko Detaloza di la Linguo Internaciona Ido". Since Esperanto has proved to be a living, stable language, nowadays Esperantists are less quick to reject influences from Ido. Probably the most fundamental of these is that
The Ludwik Zamenhof Centre a permanent exhibition - Bialystok of Young Zamenhof – and various temporary exhibitions, concerts, film projections, and theatre performances. Moreover, the Centre regularly holds panel discussions, lectures, and literary promotions. The Zamenhof Centre organises also numerous educational workshops for children and teenagers and introduces modern social and educational projects, such as Living Library and „Discover Bialystok” – an outdoor game realised in the urban area of the city. The building where the Ludwik Zamenhof Centre is situated was included in the Jewish Heritage Trail, which was opened in June 2008 in Bialystok. The Trail was created by a group of