The Medieval period of European history between the fall of the Roman Empire and the beginning of the Renaissance is also known as the Middle Ages or the Dark Ages. It describes the period from about the 400's through the 1400's. The word medieval is from the Latin words medium (middle) and aevum (age).
https://www.history.com/topics/middle-ages
https://worldbookonline.com/student-new/#/article/home/ar360060/medieval%20europe