The structure built by the ancient Romans to facilitate trade and military movement was the Roman road network. This extensive infrastructure included roads, bridges, and tunnels that connected various regions of the Roman Empire. The construction of roads was crucial for efficient transportation of troops, goods, and communications across vast distances, enhancing trade and administrative control. The most famous of these roads was the Via Appia, connecting Rome to the southern regions of Italy. The durability and engineering excellence of Roman roads were remarkable, many of which are still in use today, demonstrating the lasting impact of Roman engineering on modern infrastructure.