The arrival in Malta of Caravaggio, who painted at least seven works during his 15-month stay on these islands, further revolutionized local art. Two of Caravaggio's most notable works, "The Beheading of St. John the Baptist", and "St. Jerome" are on display in the Oratory of St. John's Co-Cathedral, Valletta. His legacy is evident in the works of local artists Giulio Cassarino (1582–1637) and Stefano Erardi (1630–1716). However, the Baroque movement that followed was destined to have the most enduring impact on Maltese art and architecture. The severe, Mannerist interior of St. John's Co-Cathedral was transformed into a Baroque masterpiece by the glorious vault paintings of the celebrated Calabrese artist, Mattia Preti. Preti spent the last 40 years of his life in Malta, where he created many of his finest works, now on display in the Museum of Fine Arts, in Valletta. During this period, local sculptor Melchiorre Gafà (1639–1667) emerged as one of the top Baroque sculptors of the Roman School.