A visit to Naples is not complete if one does not see Caravaggio’s The Seven Acts of Mercy {painted in 1606/07} and The Martyrdom of St Ursula {painted 1610}.
Likewise, a visit to Malta is not whole without seeing The Beheading of John the Baptist {painted 1607/ 08}.
Here are 4 books to read before one embarks. I visited Naples in 2018 and will land on Malta on Christmas day 2019 after visiting Cyprus.
For a good description of the above three paintings see Caravaggio The Complete Works by Schutze 2017 ed. pages 412, 422 and 445} What is the most famous shipwreck on Malta? A bay is named after this person.