London’s last piano factory goes under the hammer

Originally built as a major visitor attraction, agents say The Diorama 'represents a truly generational opportunity' to create 'a private headquarters, cultural destination, world-class residence or legacy…

Now a fully-modernised private mansion with interiors by Hubert Zandberg, this Portland Place townhouse starred in a Hitchcock movie and served as a dictator's London base.

Built as the entrance-way to Rutland House, this unique property provides a pied-à-terre apartment and office space with a private cobbled courtyard, moments from The Ritz.