The difficulty in distinguishing beauty and art in some medieval expressions

To flee from common places, it would be necessary to determine what is understood as beauty, distinguishing how this concept has been modified in relation to geographical space, periods of historical time and what the different centers of power have instituted as such. Something extremely complex because, fundamentally, I consider that it cannot be defined beyond than what generates an "aesthetic" tension that drives us to say: how nice!!! How ugly!!! But this "tension" is crossed by a whole discourse that makes us distinguish the beautiful and the ugly as such. What do we think of art in the medieval period? Because classical Greek art is still "seen" in many works, especially from Renaissance, modern and even contemporary, but we do not find the different perspective with which the medieval has expressed itself, with that recognition - and it does not seem
to interest too much "See" - although, its superposition of close and  distant planes - I - dare to find them stylized? in some of Picasso’s, Kandinsky’s, Magritte’s works ... I know it might seem "crazy" what I say, but here go certain images.