Schloßberg (Slovene: Gradišče) is a former municipality in the district of Leibnitz in the Austrian state of Styria.

Since the 2015 Styria municipal structural reform, it is part of the municipality Leutschach an der Weinstraße.

[2] Before World War One, it had an ethnic Slovene majority: according to census of 1910, 50.2% of the population was Slovene speaking, and 49.8% was German speaking.

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