The empire known for creating the first postal system was the Persian Empire, particularly under Darius the Great in the 5th century BC. Darius established an extensive network of roads and relay stations, known as the King's Road, which enabled rapid communication across the vast empire. This system allowed messages to be transported efficiently, utilizing mounted couriers who could cover great distances in a short time. The innovation of a formal postal service greatly improved administrative control and governance, influencing subsequent civilizations. The concept of organized communication systems laid groundwork for future postal services in various empires and nations.