This picture came as the second painting for Isabella d'Este's studiolo by Mantegna. This was preceded by the Parnassus of 1497. It shows a tall fence that encloses a marsh. In the triumph of the vices, it is clear that the vices have an upper hand in ruling the enclosure. There is evidence of hideous figures that are the vices ruling the fence. These hideous figures as portrayed can only be medieval. This is because there are scrolls that were prevalent in medieval times. Diana is portrayed as being rescued by Minerva, who in essence is seen chasing idleness.
Diana being the goddess of chastity must not be raped as a Centaur, a symbol that is associated with concupiscence, is seen trying to do. There is a tree that has human virtues just beside Minerva with Justice, Temperance and Fortitude above it; the theological virtues. These are the moral values that are considered as core and primary in the life of any human being.
This work is done in a tactical way, ensuring that emotions are elicited as intended. There is a deliberate move to show the vices that were trying to invade the garden of virtues. These vices are seen being chased from the garden as is evident in the triumph of the virtues. This is not an easy task since the vices have control of the garden as they rule it. It will require Minerva to exert real effort to ensure that the battle is won. Without proper effort, it will not be possible to defeat the vices.
As you keenly look at the triumph of the virtues, it is evident that vices can never prevail over virtues if there is a willingness to expel them. The vices are seen as being chased from the garden. This is a splendid way of expression. However, it must be noted that success will be equivalent to the effort put, as seen in the triumph of virtues.