The Upper German-Raetian Limes covers a length of 550 km and runs between Rheinbrohl on the Rhine and Eining on the Danube, built in stages during the 2nd century. With its forts, fortlets, physical barriers, linked infrastructure and civilian architecture it exhibits an important interchange of human values through the development of Roman military architecture in previously largely undeveloped areas thereby giving an authentic insight into the world of antiquity of the late 1st to the mid-3rd century AD. It was not solely a military bulwark, but also defined economic and cultural limits. Although cultural influences extended across the frontier, it did represent a cultural divide between the Romanised world and the non-Romanised Germanic peoples.UNESCO. “Frontiers of the Roman Empire” UNESCO.org. Accessed: 05.22.2019: https://whc.unesco.org/en/list/430
I came across this excellently produced animated illustration of a Roman castra, or fort, today as I was researching fortress layouts. This imagery represents the Roman fort at Templeborough, which, according to Wikipedia, was first built in timber between 43 and 68 AD and later upgraded to stone construction.
It appears to have been home base for a Gallic cohort, Cohors IV Gallorum, during the late 1st or early 2nd centuries. Its use for a cohort would make it a smaller scale fort, presumably less than 6 hectares. I am not personally familiar with the site, so comments and additional information from readers in the know is welcomed.