The land around Kidderminster may have been first populated by the Husmerae, an Anglo-Saxon tribe first mentioned in the Ismere Diploma, a document in which Ethelbald of Mercia granted a "parcel of land of ten hides" to Cyneberht. This developed as the settlement of Stour-in-Usmere, which was later the subject of a territorial dispute settled by Offa of Mercia in 781, when he restored certain rights to Bishop Heathored. This allowed for the founding of a monastery or in the area.