During the Roman army’s conquest of Northern Britain, towards the end of the 1st century AD, a small timber fort was built at the northern tip of Windermere to house a garrison of 200 men. This early fort was soon abandoned, but the site was reoccupied early in the 2nd century AD.
This second fort was built in stone on a raised platform which is still visible. It was larger to house a cohort of 500 auxiliary infantrymen. The fort remained in use until the 4th century AD, with a large civilian settlement developing on its north and east sides.
The central headquarters building contained a 1.8-metre (6 ft) square cellar accessed by a stone stairway which probably was used as a strong-room for regimental funds.
https://www.english-heritage.org.uk/visit/places/ambleside-roman-fort/history/
This model was created from 127 photographs.