Il n'y a pas une annotation en français. Présenté est une annotation en Anglais.
The Antonine Wall is a stone and turf fortification. Built in the early 140's by the Emperor Antonios Pios, it was abandoned after only about 20 years and the frontier was reestablished at Hadrian's wall.
See http://en.wikipedia.org/wiki/Antonine_Wall
Tracing from http://www.antoninewall.org/