Two people have been arrested on suspicion of stealing lead from the roof of Nottinghamshire's Newstead Abbey.
Lead was stolen from the roof of the Grade I listed building between 17:00 GMT on 5 December and 08:30 GMT on 6 December, police said.
The man and woman, both aged 23, were arrested after lead was found in a back garden in Kirkby-in-Ashfield.
The lead, believed to be worth about £2,000, was also found in a car.
Nottinghamshire Police added that during an assessment by officers at a Mansfield scrap yard, more lead from the Abbey was located.
Newstead Abbey was the ancestral home of poet Lord Byron and was founded by Henry II as an Augustinian priory in the 12th Century.