The Von Trapp family home depicted in The Sound of Music (1965) was actually a combination of multiple locations and Hollywood sets. The real Von Trapp manor had been overtaken by Heinrich Himmler during the Nazi occupation of Austria.
Schloss Frohnburg, a 17th century country house, now the Mozarteum Music Academy, was used for the gates and front entrance of the villa where Maria (Julie Andrews) first approaches the Von Trapps after leaving the convent.
The lakeside terrace, though, was filmed on adjacent properties to Schloss Leopoldskron, a rococo castle on Leopoldskroner Teich. The property was known as Bertelsmann at the time. It sits on an artificial lake and the boat and terrace scenes were filmed there.
The Sound of Music was produced in Salzburg on land adjacent to Schloss Leopoldskron, used as one of the main exterior locations. The palace was never used as the Von Trapp villa, despite popular belief and the fact many Sound of Music tours practiced in the area claim otherwise. The nearby property (known as Bertelsmann, at the time) was the location for many outdoor scenes, including the pink lemonade scene on the terrace, Maria and the Captain (Christopher Plummer) arguing on the terrace, and the capsized boat scene. Any lake shots were filmed at Bertelsmann, using a replica of Leopoldskron's terrace and gates. Shots of the building itself were filmed at Schloss Frohnburg, and the decor of the ballroom used for the interior scenes is identical to Leopoldskron's Venetian Room, but was a set constructed in Los Angeles.
The Von Trapp gazebo once stood in the grounds of Leopoldskron, but it was moved and reconstructed in the ornamental gardens of Schloss Hellbrunn, Morzger Strasse. The interior shots, however, were done in a reconstructed gazebo at 20th Century Fox because the interior of the real one was too small for shooting.
All the house's other interior shots were created at 20th Century Fox.