Wessex in classical heraldry and is found on a number of church windows in derived shields such as the Arms of the Collegiate Church of St Peter at Westminster (Westminster Abbey, which was founded by the king). At its greatest extent Wessex encompassed the modern areas of Hampshire, Isle of Wight, Dorset and Wiltshire, as well as the western half of Berkshire and the eastern hilly flank of Somerset. This covers an area of about . The English author Thomas Hardy used a fictionalised Wessex as a setting for many of his novels, adopting his friend William Barnes' term "Wessex" for
Wessex overwhelmed the Danes of Mercia and East Anglia, bringing all of England south of the Humber under Edward's power. In 918 Æthelflæd died and Edward took over direct control of Mercia, extinguishing what remained of its independence and ensuring that henceforth there would be only one Kingdom of the English. In 927 Edward's successor Athelstan conquered Northumbria, bringing the whole of England under one ruler for the first time. The Kingdom of Wessex had thus been transformed into the Kingdom of England. Although Wessex had now effectively been subsumed into the larger kingdom which its expansion had created, like the