Page not found (404)

Request Method: GET
Request URL: http://djg-halle.de/events/vortrag-die-japanische-mentalit%25C3%25A4t-nach-shinto/
Raised by: mezzanine_agenda.views.event_detail

No Event matches the given query.

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.