The Tungri, not mentioned by Caesar, came to dominate this area in the Roman era, and are the reason for the name of the modern name Tongeren. Tacitus says that Tungri was a new name for the original tribes who had previously been called the "Germani". But many modern writers believe that the Gallo-Roman population of the area contained a significant amount of more recent Germanic immigrants from across the Rhine. Located on the important road linking Cologne to Bavay via the relay of Liberchies, and surrounded by the fertile lands of the Hesbaye region, Roman Tongeren quickly became one of the largest Gallo-Roman administrative and military towns in the first century. It suffered from a destructive fire during the Batavian siege in 70 AD, which was part of the Batavian revolt. In the second century, it erected a defensive wall, portions of which can still be seen today. Typical Roman buildings were built in town, while villas and mound graves (tumuli) dotted the surrounding area.