The Rotunda was started in 1739, the year of Thomas Wentworth's death and completed by his son William Wentworth in 1742. It is a round Ionick temple, based on the temple of Hercules at Tivoli, near Rome.

The Rotunda originally stood clear of trees on a grassy hill, but is now overgrown with vegetation.  We are working to fully repair the Rotunda, which is in a poor state, and is without a roof. The trees and undergrowth are being removed and the existing stone structure consolidated. A new timber and lead domed roof will re-emphasise the importance of the building in its landscape setting. We are looking forward to officially reopening the Rotunda shortly.