In which historical period was Lanercost Priory built?

Player #33161631, It was founded in 1169 probably 1000 years after the time of Hadrian . Do you think the good people of Hastings lose sleep over the possibility of a Norman invasion? Or people in Agincourt stay inside to avoid the arrows of English longbow archers?

It is difficult to imagine that the monks had not realised they were building in a battle zone. Hadrians wall would have been a massive clue!