Beaulieu Palace House was originally built in the 13th century as the gatehouse of Beaulieu Abbey. Following the Dissolution of the Monasteries, the estate was purchased by Sir Thomas Wriothesley, later 1st Earl of Southampton, in 1538. The house passed through marriage into the Montagu family and is still owned by the 1st Earl's descendant, the 4th Baron Montagu of Beaulieu.

The house was extended in the 16th century, and again in the 19th century, and is today a fine example of a Gothic country house. The house overlooks Beaulieu River and is surrounded by lawns and walkways. The inside of the house has been kept in a Victorian style.

Although still home to the current Lord and Lady Montagu, parts of the house and gardens are open daily to the public. It is a member of the Treasure Houses of England consortium.

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