Roman Cumbria to Wallsend on the Tyne estuary, with additional military installations running down the Cumbrian coast from Bowness to Risehow, south of Maryport, in an integrated fashion (and with forts at Burrow Walls and Moresby that were perhaps not part of the system). Historians believe that the Turf Wall from the River Irthing to Bowness-on Solway was rebuilt in stone in two stages. The most easterly five miles were rebuilt at the time of Hadrian, with the remainder being rebuilt after 150 AD. However, this is open to dispute: it is uncertain whether the building works in the second half of
Hadrian he had nominated Hadrian as emperor. Rome's military and Senate approved Hadrian's succession, but soon after, four leading senators who had opposed Hadrian, or seemed to threaten his succession, were unlawfully put to death; the senate held Hadrian responsible for this, and never forgave him. He earned further disapproval among the elite by abandoning Trajan's expansionist policies and recent territorial gains in Mesopotamia, Assyria and Armenia, and parts of Dacia. Hadrian preferred to invest in the development of stable, defensible borders, and the unification, under his overall leadership, of the empire's disparate peoples. He is known for building Hadrian's Wall,