The Qin dynasty lasted for only 15 years, from 221 BCE to 206 BCE. The Han dynasty founded by Liu Bang (later Emperor Gaozu) followed the Qin dynasty. The Han dynasty was based on civic virtues (Confucius principles) combined with some elements of legalism. From the establishment in 206 BCE to the final collapse in 220 BCE, the Han Dynasty lasted approximately 426 years, excluding the brief Xin Dynasty interregnum. This period lasted far longer than the Qin Dynasty, which lasted 15 years.