AI overview
I don't have sufficient context to provide an accurate overview of "406." The context provided only indicates "year," which could refer to many different things (a historical year, a regulation, a product designation, etc.). To write an accurate and neutral overview, I would need more specific information about what "406" refers to.
AI-generated from the Wikipedia summary — may contain errors.
Article
Gu Kaizhi
Year 406 (CDVI) was a common year starting on Monday of the Julian calendar. In the Roman Empire, it was known as the Year of the Consulship of Arcadius and Probus (or, less frequently, year 1159 Ab urbe condita). The denomination 406 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.