Goliath
Goliath is described in the biblical Book of Samuel as a Philistine giant defeated by the young David in single combat. The story signified Saul's unfitness to rule, as Saul himself should have fought for the Kingdom of Israel.
David with the Head of Goliath (Caravaggio, Rome)
The masterpiece in Rome is a "twin" of a second artwork on the same subject, David and Goliath, as reported in the inventory of the Galleria Borghese dated 1693, where is found that one was located in the first room, and the other in the fourth room.