Which period do artists abandon the verisimilitude (true likeness or realism) of the Greek classical heritage in favor of increased abstraction?

Artists began to abandon the verisimilitude of the Greek classical heritage during the late medieval period, particularly with the onset of the Renaissance in the 14th century. However, it was during the 20th century, particularly with movements like Abstract Expressionism and Cubism, that artists fully embraced abstraction, moving away from realistic representation. This shift allowed for more personal expression and exploration of form, color, and texture, redefining the purpose and style of art.