Powerscourt Estate, located in Enniskerry, County Wicklow, Ireland, is a large country estate which is noted for its house and landscaped gardens, today occupying 19 hectares. The house, originally a 13th-century castle, was extensively altered during the 18th century by German architect Richard Cassels, starting in 1731 and finishing in 1741. A fire in 1974 left the house lying as a shell until it was renovated in 1996.
The Wingfield family had long coveted the lands of Phelim O'Toole of Powerscourt, seeking to draw Phelim O'Toole into an act of rebellion, the penalty for which was forfeiture. The feud climaxed on 14 May 1603 when the Wingfields murdered Phelim in the place known as the Killing Hollow near Powerscourt, despite the fact that Phelim's grandson and heir Turlough son of Phelim's son remained in occupation of Powerscourt. King James I of England on 27 October 1603 granted a lease of the manor of Powerscourt for 21 years to Sir Richard Wingfield for a rent of £6 Irish and a knight's fee. The reasons for the forfeiture of the O'Toole estates were because of the rebellious acts of Brian O'Neill and Phelim O'Toole himself.