Alain de Lille, also known as Alanus de Insulis, was a prominent 12th-century French theologian, poet, and scholastic philosopher. He is best remembered for his two major allegorical poems, "De planctu Naturae" (The Complaint of Nature) and "Anticlaudianus," which blended classical learning with Christian doctrine. His works had a significant influence on later medieval thought and literature, earning him the honorific title "Doctor universalis" for the breadth of his knowledge. Alain's writings explored the harmony between faith and reason, contributing to the intellectual vibrancy of the 12th-century Renaissance.