Complex sentence: The Archaic Style introduces an element of realism that will later be developed to its fullest in the later Classical Style, but retains some of the formalism of the Geometric Style in its rules of symmetry.
Split into simpler sentences: The Archaic Style introduces an element of realism that will later be developed to its fullest in the Classical Style. At the same time the Archaic Style retains some of the formalism of the Geometric Style in its rules of symmetry.