Few place names carry two associations this far apart. For Berliners it means the lake, the beach, the ferries and summer. Internationally it means the villa and what was decided in it. Both are served by institutions, and both use this extension. The memorial and its documentation centre are educational bodies; the beaches, sailing clubs and district associations are community organisations. That gives the name an unusually wide and unusually serious set of potential holders: a historical or educational organisation, a memorial project, a district community site, a recreation association, or a Berlin travel resource.