Holdenby House is a historic country mansion located in Northamptonshire, England. It was built in the 16th century for Sir Christopher Hatton, a close friend and advisor to Queen Elizabeth I. The house was later owned by King James I, who used it as a prison for important political figures such as Sir Walter Raleigh. During the English Civil War, Holdenby House was captured by the Parliamentarians and used as a headquarters by Oliver Cromwell.

After the war, the house was sold to a private owner and fell into disrepair. It was later restored and now operates as a venue for weddings, corporate events, and other functions. Visitors can tour the house and its gardens, which feature a mix of formal and informal landscaping. The house is also home to a collection of fine art and historical artifacts, including a portrait of Queen Elizabeth I painted by Nicholas Hilliard.