AACHEN, GERMANY—Live Science reports that traces of a 1,700-year-old Roman fort have been found under a cobblestone street in western Germany’s city of Aachen. “The way the wall was built left no doubt it had to be of Roman origin,” said archaeologist Donata Kyritz. “The concrete-like mortar and the choice of rock was typical for the Roman period. Also, the dimensions and the way the foundation was built differed from the technique used in medieval times,” she explained. The section of surviving wall is about 23 feet long and 35 inches wide. The structure may have surrounded the city in the third century. For more on Roman Germany, go to "The Road Almost Taken."