Renaissance of the 11th century
The expression Renaissance of the 11th century designates a historical phase of the Late Middle Ages characterized by renewed religiosity, but above all by economic development that brought about noticeable changes in social life. Some historians have called this phase of cultural development, dated around the 11th century, the "Medieval Renaissance." This appellation has been disputed by others, such as historian Girolamo Arnaldi, who recognizes as "Medieval Renaissances" only " [...] those of law and philosophy, in the 12th century, because the law that was revived was Roman law, codified by the Emperor Justinian, and the philosophy that came back into vogue was Greek philosophy, in particular Aristotle," and therefore one can speak of a Renaissance insofar as that of the 15th century would be characterized precisely by the revival of interest in Greek and Roman classicism.
Source: Wikipedia — Renaissance of the 11th century (CC BY-SA 4.0)