Hadrian's Wall History

Hadrian's wall was built because Hadrian thought that they wouldn't be able to mantain the border.
The wall towered fifteen feet high, it had parapets rising aditional six feet above that, also a nine feet ditch was dug at its base.
The main problem when building this wall was to carry the materials to the constructing site, three legions were needed to move heavy rocks. It took 5 years to complete the wall.
The wall also had superforts, with barracks, assembly hall, temple, hospital and a bath house were some of the facilities inside this superforts.