Shots of the building itself were filmed at Schloss Frohnburg .
The decor of the ballroom used for the interior scenes is identical to that in Leopoldskron 's Venetian Room ( the Venetian Room is much smaller than the ballroom ) .
Shots of the building itself were filmed at Schloss Frohnburg and the decor of the ballroom used for the interior scenes is identical to that in Leopoldskron 's Venetian Room ( the Venetian Room is much smaller than the ballroom ) .