The settlement covered nearly 20 acres and had a defensive wall but no military buildings. Its existence shows that the Romans were living next to and trading with German "barbarians" peacefully for years, right up until the Teutoburg defeat, according to lead researcher Gabriele Rasbach of the German Archaeological Institute. Most of the settlement’s buildings were made of wood, and based on tree-ring data, archaeologists say the town was built from scratch beginning in 4 B.C. Behind 10-foot-tall timber walls, Waldgirmes had pottery and woodworking workshops, Roman-style residences, and even traces of lead plumbing. A multistory administrative building sat at...