When did medieval philosophy develop in western Europe?

Medieval philosophy in western Europe developed during the Middle Ages, spanning from the fall of the Roman Empire in the 4th and 5th centuries CE to the Renaissance of the 15th century.1

This period of philosophical speculation emerged from the confluence of Greek philosophy and Christianity. As early as the 4th century CE, thinkers such as St. Ambrose and St. Augustine began integrating Neoplatonism into Christian doctrine to provide a rational interpretation of faith. Throughout the early medieval period—which extended until the 12th century—philosophy was primarily cultivated by late Roman thinkers and later by monks within monasteries, which served as the primary centers of learning until the rise of cathedral schools and universities.12