Alfonso Simonetti (29 December 1840 - 22 August 1892) was an Italian painter of historical scenes, portraits and landscapes; best known for his works with moonlight and sunset effects.
Simonetti was born in Naples, Italy, to the painter Giuseppe Simonetti (1840-1864) and his wife Vincenza, née Piccirillo.
In 1859, he enrolled at the Royal Academy of Fine Arts, where he studied under Gabriele Smargiassi and Giuseppe Mancinelli.