What is the name of the 'chateau' that was used in the film?
to answer my own question - it's Waddesdon Manor, Buckinghamshire, England.
Has this been filmed in Salzburg, Austria, like in the book?
To answer my own question: unfortunately not. Spottiswoode skipped the "Derwatt in Salzburg" scenes and also skipped Ripley being buried alive, two of my favorite scenes :(.