In 529 CE, the Byzantine Emperor Justinian I issued a imperial decree banning pagans from teaching and ordering the closure of the non-Christian schools of philosophy in Athens. This event marks one of the most critical turning points in intellectual history, signaling the official, institutional end of the ancient rationalistic and pagan philosophical tradition on European soil.

The Academy of Athens, originally founded by Plato in 387 BCE, had stood as a beacon of intellectual freedom and secular study for over nine centuries. Justinian's decree was driven by a political and religious desire to enforce strict Christian orthodoxy throughout the empire and eradicate what he viewed as heretical and pagan ideologies.

Following the ban, the last seven Neoplatonic philosophers of the Academy, led by Damascus, chose exile over conversion, seeking asylum at the court of the Sasanian King Khosrow I in Persia. This migration saved the philosophical manuscripts from destruction, transplanting the ancient Greek inheritance eastward where it was translated into Syriac and later Arabic. This intellectual transmission eventually laid the groundwork for the Islamic Golden Age and the translation movements of Baghdad's House of Wisdom, while in Europe, it symbolized the definitive threshold into the Middle Ages.