St. Roch and the Angel
Church of Saint-Nicolas-des-Champs, Paris
This is the episode in St. Roch's vita when the angel tells him he has been cured (note the healthy thigh) and must now return to Montpellier from this shelter in the forest. The structure behind the angel apparently represents the well that God had provided some years before.
Read more about images of St. Roch.
Source: this page at Wikimedia Commons.