
Coronis, loved by Apollo, was unfaithful to the god. Apollo's bird, the raven, revealed her infidelity to him and Apollo thereupon slew her. (Ovid, 'Metamorphoses' 2:600 ff).
The fresco (transferred to canvas) comes from a series painted in the Stanza di Apollo in the garden pavilion of the Villa Aldobrandini, Frascati.
For this episode, Domenichino made a detailed pen drawing of the composition and chalk studies of each figure (Windsor, Royal Collection), but the execution of the fresco was left mostly to assistants.