Sixteenth painting in the 'Inferno di Dante Alighieri' series.
The eighth circle of Hell, also know as Malebolge, is a large, funnel-shaped cavern, itself divided into ten concentric circular trenches or ditches. Each trench is called a bolgia (Italian for "pouch" or "ditch").
The sixth bolgia hosts the hypocrites: they walks around a narrow track for eternity, weighted down by leaden robes. The robes are brilliantly gilded on the outside and are shaped like a monk's habit.