The original house was designed by park ranger and amateur architect, Nathaniel Clements in the mid eighteenth century. It was bought by the Lord Lieutenant of Ireland. His official residence was in the Viceregal Apartments in Dublin Castle. The house in the park then became the "Viceregal Lodge", the "out of season" residence of the Lord Lieutenant (also known as the Viceroy), where he lived for most of the year from the 1820s onwards. During the Social Season (January to St. Patrick's Day in March) he lived in Dublin Castle.