Brownsea Castle

Brownsea Castle, also known as Branksea Castle, is a mid-16th century square blockhouse, protected by a moat, which was built on Brownsea Island, a small island in Poole harbour. It was renovated during the 19th century as an impressive residence but was badly damaged by fire in 1895. It has been rebuilt and is now used exclusively by the John Lewis Partnership.

The island is owned by the National Trust and is open April–September. The castle is private.

In 1547 due to external invasions the island was fortified and later came to be known as brown sea castle.

The building is Grade II listed.