Conversion of the Heretic (scene 15, east wall)

The little lunette field to the left of the window depicts the Conversion of the Heretic and Manichaeist presbyter Fortunatus. Here St Augustine is depicted as a bishop, though he is wearing the habit of the Augustinian hermits beneath his surplice. The event is described in the “Legenda Aurea” and refers to the many conversions made by St Augustine and his successful battle against heresy.