Coordinates: 49°41′39″N 06°19′49″E / 49.69417°N 6.33028°E Betzdorf Castle (Luxembourgish: Betzder Schlass, French: Château de Betzdorf, German: Betzdorf Schloss/Schloss Betzdorf) is a former castle in the commune of Betzdorf, in eastern Luxembourg. It is the headquarters of SES S.A., the world's largest satellite operator in terms of revenue and the largest component of 's main LuxX Index. It is located north-west of Betzdorf village, to the north of the CFL Line 30 railway line. Since its acquisition by SES, the company has built a large commercial and industrial centre on the castle.
It should not be confused with Berg Castle, located in nearby Berg, which serves as the communal headquarters for Betzdorf.
The castle was the home of Hereditary Grand Duke Jean from his marriage to Joséphine-Charlotte of Belgium, on 9 April 1953, until 16 November 1964, when he succeeded to the Grand Duchy upon Grand Duchess Charlotte's resignation. All of Jean and Joséphine-Charlotte's children were born at Betzdorf Castle: