AI overview
I don't have enough context to write an accurate overview of "266." The context provided only indicates it's a year, but without additional information about what specifically happened in 266 or what "266" refers to in a particular context (a historical event, scientific discovery, etc.), I cannot provide a factual overview.
AI-generated from the Wikipedia summary — may contain errors.
Article
Odaenathus (totius Orientis imperator)
Year 266 (CCLXVI) was a common year starting on Monday of the Julian calendar. At the time, it was known as the Year of the Consulship of Gallienus and Sabinillus (or, less frequently, year 1019 Ab urbe condita). The denomination 266 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.