License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Stefano della Bella. The test of fire, the monk Peter, the disciple Saint John Gualbert, passing through the flames from two pyres unharmed, from "Frontispiece and four scenes from the life of Saint John Gualbert" (Frontispice et quatre vignettes pour une vie de Saint Jean Gualbert), 1640. The Metropolitan Museum of Art.