Information: - Glastonbury Tor is a hill near Glastonbury in the English county of Somerset, topped by the roofless St Michael's Tower, a Grade I listed building. The whole site is managed by the National Trust, and has been designated a scheduled monument. - In the United Kingdom, a scheduled monument is a 'nationally important' archaeological site or historic building, given protection against unauthorised change. - The Chalice Well , also known as the Red Spring , is a well situated at the foot of Glastonbury Tor in the county of Somerset , England . The natural spring and surrounding gardens are owned and managed by the Chalice Well Trust ( registered charity no. 204206 ) , founded by Wellesley Tudor Pole in 1959 . The Chalice Well symbol was also an inspiration for the Eye of Elena in Sarah J. Maas ' Throne of Glass series and also featured in the Kingdom of Mei series as the key teaching of Christianity being a cyclical cataclysm Research by Exeter University School of Geology in 2009 found that the Chalice Well is fed by a deep aquifer in the lower levels of the Pennard Sands . What object entity has the relation of 'heritage status' with the subject 'chalice well'? Choices: - archaeological site - grade i listed building - scheduled monument
grade i listed building