There is an old expression, "All roads lead to Rome." In ancient Rome, Rome was the heart of the empire. Each time a new city was conquered, a road was built from that city back to Rome. Roads were built in straight lines. Many had gutters. Along the side of the road, the Romans built road signs called milestones. Milestones did not give any information about other towns in the area. Milestones told how far it was back to Rome. Occasionally, milestones also listed who built that section of road and how much it cost! Roman roads were built so well that some are still in use today.