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When did Emperor Hadrian visit Britain and order the building of Hadrian’s Wall?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Historical map of ancient Britain featuring three sections: a main map of Roman Britain showing Roman roads, frontier walls, principal settlements, forts, mines, and key tribal regions; an inset of prehistoric Britain marking Neolithic, Mesolithic, and Bronze/Iron Age sites; and a smaller map illustrating the stages of Roman conquest with color-coded tribal territories and years of conquest.
Roman Britain

Emperor Hadrian visited Britain in 122 CE. During this visit, he initiated the construction of the defensive barrier known as Hadrian’s Wall, which was intended to mark the limit of the Roman world and separate the Romans from the barbarians.123