Is the historical event that ushered in the beginning of the Classical period?

The Classical period is generally marked by the rise of ancient Greece, particularly following the Persian Wars in the 5th century BCE, which established Athens as a dominant cultural and political force. This era is characterized by significant advancements in philosophy, art, and governance, including the emergence of democracy. Additionally, the conquests of Alexander the great in the 4th century BCE expanded Greek influence, solidifying the cultural and intellectual foundations that define the Classical period.