Eboracum workshops growing up outside the fortress to supply the needs of the 5,000 troops garrisoned there. Production included military pottery until the mid-3rd century, military tile kilns have been found in the Aldwark-Peasholme Green area, glassworking at Coppergate, metalworks and leatherworks producing military equipment in Tanner Row. In the Roman period, Eboracum was the major manufacturing centre for Whitby Jet. Known as "gagates" in Latin, it was used from the early 3rd century as material for jewelry and was exported from here throughout Britain and into Europe. Examples found in York take the form of rings, bracelets, necklaces, and pendants
Eboracum who doubtless flocked to Eboracum to take advantage of them. As a result, permanent civilian settlement grew up around the fortress especially on its south-east side. Civilians also settled on the opposite side of the Ouse, initially along the main road from Eboracum to the south-west. By the later 2nd century, growth was rapid; streets were laid out, public buildings were erected and private houses spread out over terraces on the steep slopes above the river. From its foundation the Roman fort of Eboracum was aligned on a north-east/south-east bearing on the north bank of the River Ouse. It measured