Commentary Purg XXIX 106-107

The chariot, as will become evident, represents the Church, an opinion for which there is essential consensus.  Its two wheels, however, are variously interpreted.  Do they represent the two Testaments (but these are fully represented in the pageant, as Bosco/Reggio [DDP Bosco.Purg.XXIX.107] rightly object)?  Wisdom and Love?  The active and the contemplative life?  We probably need to understand literally that Dante wanted his chariot to look something like, not a four-wheeled oxcart, but a two-wheeled Roman triumphal chariot.  It may be better to leave allegory to one side.  Scartazzini (DDP Scartazzini.Purg.XXIX.106-120) offers a scathing review of the attempts mentioned above and still others.