I don't have specific context provided about "620 BC" beyond it being labeled as a "year." Without additional information about what historical events, civilizations, or developments occurred in that year, I cannot accurately write an overview that meets your requirement of being based only on provided context and not inventing facts.
AI-generated from the Wikipedia summary — may contain errors.
The year 620 BC was a year of the pre-Julian Roman calendar. In the Roman Empire, it was known as year 134 Ab urbe condita . The denomination 620 BC 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.
Births
via Wikipedia infobox
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).