'classicalness' originates from English, specifically the word 'classical' plus the suffix '-ness', where 'classical' ultimately comes from Latin 'classicus' (via French 'classique') and the suffix '-ness' comes from Old English 'nes(s)' meaning 'state, quality'.

'classicalness' changed from Latin 'classicus' to French 'classique', then to Middle/Modern English 'classical', and the modern English noun 'classicalness' was formed by adding the English suffix '-ness'.

Initially, 'classicus' meant 'of or pertaining to a class (division)', but over time 'classical' came to mean 'belonging to antiquity or following established artistic/ literary models'; 'classicalness' now denotes the quality of being classical in that sense.