This article explains how the site of the C12 castle in Sheffield, where Mary Stuart was held but which has been lost since partial demolition and decay in the 1640s, is being explored by organisations including Keltbray, after previous work by Wessex Archaeology from 2018. The area, now known as Castlegate, includes the confluence of the Don and the eponymous Sheaf and the work should be completed by next summer
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