Imperial Roman army other military facilities e.g. Hadrian's Wall itself was built by the army. But they also built up much of a province's Roman infrastructure: trunk Roman roads, bridges, docks, canals, aqueducts, entire new cities such as "coloniae" for veteran legionaries, public buildings (e.g. basilicas and amphitheatres). The army also carried out large-scale projects to increase the land available for agriculture, such as forest clearance and draining marshes (e.g. the large-scale drainage of the Fens in eastern England, which were probably developed as a huge imperial estate). The army also excavated many of the mines and quarries that produced the raw materials
Roman amphitheatre the Roman city of Pompeii, and was buried by the eruption of Vesuvius in 79 AD, that also buried Pompeii itself and the neighboring town of Herculaneum. It is also the oldest surviving Roman amphitheatre built with stone. The second-largest Roman amphitheatre was the Faleria, built 43 A.D. It was located in Picenum (now Falerone), Italy. Its building dimensions were 178.8 × 106.2 meters, and it had an arena shaped like an ellipse. It had twelve entrances, four of which led to the arena and had eight rows of seats divided into three sections. Only the outside wall of the