 Five Roman technologies we still use today, and you thought about them. Number five, do you prefer sewage to be underground? Well, thank the Romans. They greatly expanded the use of underground sewage systems in Europe. Number four, concrete feels modern, right? We build skyscrapers and roads with it. But Romans were building with it a long time ago. It's the reason so many of their structures are still standing today. Number three, aqueducts. Romans didn't even invent them, but they perfected them. Rome's Trevi fountain today is supplied by an aqueduct built by the ancients. Number two, roads. Yes, the ability to build extensive road networks, but also building them to last. Across Europe, many of those Roman roads are still being used today. At number one, the calendar. Julius Caesar implemented the calendar we use now in 46 BCE with one minor difference. He didn't include leap years. Pope Gregory added those later. So weird, I rarely think about the Roman Empire. Hey, if you can help us out, support us at patreon.com slash dtns.