Eurocon 2017 (U-Con) will be held June 16-18, 2017 at the Fritz Henssler Haus in Dortmund, Germany. Guests of honor will include Andreas Eschbach, Dave Hutchinson, Autun Purser, and Aleksander Žiljak. Membership registration for the event costs €40 until April 15, 2017, after which rates will go up. For more information, see the official Eurocon 2017 website.
The 40th Eurocon (Nemo 2018) will be held July 19-22, 2018 at the Dewailly Cloister in Amiens, France. The decision was made by vote on November 5, 2016 during Eurocon 2016 in Barcelona, Spain. Amiens is famous as the burial place of Jules Verne. The author lived in the city for many years, was elected to its town council, and died there in 1905.
Memberships are currently €35. For more information, see the official Eurocon 2018 website.