The Churchill was a powerful tool in the hands of the allieds when the time to expell the germans from Holland came, so I suppose that is the beauty seen by Patrick.
Otherwise the tanks is quite ugly but that doesnt take away effectiveness, just grace.
More images of the AVRE and its 290 mm spigot mortar.
The device was reloaded by the muzzle, not very good under combat conditions, projectile weight 18 kg, range 100 yards.