In 1979 construction works for a new wing of the town hall on the Dutch island of Ameland revealed an old cellar containing large quantities of shells of the European flat oyster Ostrea edulis Linnaeus, 1758. These shells are believed to have been cultured at a local oyster bed that was stocked with young oysters from Colchester and Beversom (Thames estuary, England). A sample of the oyster shells has been kept in a local museum; measurements of these shells were taken in 2018.