Simplify the following text for a Grade 15 native English-speaking person.
Original: Classicism is a force which is often present in post-medieval European and European influenced traditions ; however , some periods felt themselves more connected to the classical ideals than others , particularly the Age of Reason , the Age of Enlightenment , and some classicizing movements in Modernism .
Simplified: Classicism influenced several periods in European history , especially the Italian Renaissance , Age of Reason , the Age of Enlightenment and some movements in Modernism .