Internacia Seminario (IS; "International Seminar") was the most important Esperanto youth meeting organized by the German Esperanto Youth (GEJ) at the end of every year in a different German city, December 27 to January 3. It was organised 52 times, since 1957 to 2008.
Since 2009 a new youth meeting, the Junulara E-Semajno (JES; "Youth Esperanto-Week" or "Europan Youth Week"), will be taking place instead of IS. The new meeting will be jointly organised by GEJ and the Polish Esperanto Youth (PEJ). Since 2002 the latter had been the organiser of Ago-Semajno (AS), a similar yearly meeting, which also ceased to exist with the birth of JES.
Read more about Internacia Seminario: Program of The Meeting, History