This paper aims to show that the well-known date of Medieval Philosophy, which stretches from 500 to 1500, hides its richness and influences (from previous thought and to posterior thought) and, at the same time, applies extremely rigid boundaries. Facing this theory here is defended the idea of a Long Middle Ages in the Philosophy of the broad Western tradition, which stretches from 200 to 1700. Along these pages, this thesis will be justified, and some objections will be faced, such as that it homogenizes different types of philosophy, that it underestimates the importance of modern science, or that it overlooks Renaissance Philosophy.