Events By Place Roman Empire Hadrian orders that a 72-mile (115-kilometer) wall be built in northern Britain. Hadrian's Wall, as it comes to be known, is intended to keep the Caledonians, Picts and other tribes at bay. September 13 — The building of Hadrian's Wall begins. Hadrian gives up the territories conquered in Scotland. Asia Change of era name from Jianguang (2nd year) to Yanguang of the Chinese Eastern Han Dynasty. Births Deaths… (More on 122)