Aesica
Aesica was a Roman frontier castle in the line of Hadrian's rampart, and probably corresponds to the site of Greatchester. It is, however, placed by some antiquaries at the Danish village of Netherby, on the river Esk. It is mentioned by George of Ravenna, and in the Notitia Imperii, and was the quarters of Cohors I. Astorum.
From William Smith (ed.), Dictionary of Greek and Roman Geography. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.