Kasteel van Blondel de Beauregard, also known as Kasteel van Viane, is an 18th-century estate in Viane, Geraardsbergen, with origins traced to 1545. The castle and its grounds first appeared on plans from 1762, when the barons of Blondel de Beauregard acquired the property through marriage and modified it extensively. The estate includes an orangery now used as an event hall. Designated a protected monument since 1977 and recognized as architectural heritage since 2009, the castle was sold to a private developer in 2026 for restoration.
