Monogram: is <span>a motif can be 2 or more letters (like someone's initials or signature) they are usually interwoven or combined in a decorative design, used as a logo or any other source to identify a personal possession.
Artist use it sign their work so that people know who painted the piece.</span>
I think it’s the second one
They used it in many situations especially in war, public spectacles , and church but I would say that they primary used it for entertainment or to form a sense of unity
because he just wants to follow his dream period.