This artist is famous for his depictions of biblical stories using “modern” (his time) images of people. This means that they were dressed in the clothes of his time, but he also focused on showing an intensely real version of life. His models were all a reflection of the reality of the world as a dirty and imperfect place. So his models were all average sort of people.
Caravaggio | Biography, Paintings, Style, & Facts | Britannica