Topic: Tell me a short, interesting fact about

One fascinating fact about the Roman Empire is that it was one of the first empires to have a well-developed postal system, known as the "cursus publicus." This system allowed the rapid transmission of messages and small packages across the empire, with special horses and couriers known as "missi" providing efficient communication. The system used a combination of roadways, way stations, and relay stations, and messages could travel as far as 900 miles in just three days. The cursus publicus played a crucial role in the administration and coordination of the vast empire.