The first version of the painting, created in 1596, is known
as Murtula. It was named after poet Gaspare Murtola, who
wrote of Medusa, "flee, for if your eyes are petrified in
amazement, she will turn you to stone.” It measures 48 by
55 cm in length and is signed Michel A F (Latin: Michel
Angelo Fecit), meaning "Michel Angelo made [this]."This
work is privately owned.
The second version of the painting is known
as Medusa (Italian: Testa di Medusa). It is slightly bigger
than the first, measuring 60×55 cm in length. Although the
work is not signed or dated, it is believed by some to have
been completed in 1597. It is held in the Uffizi Museum.
https://www.dailyartmagazine.com/caravaggio-medusa/
2 Medusa Versionen