Girolamo Sannazaro, delegat från Mantua Anselm van Hulle (1601-1674)

The picture has something of this: people, saint, man, portrait, cross, cape, Renaissance, sword, crown, royalty, Gothic, book, facial hair.
Perhaps it’s a close up of a painting of a man in a black suit with gold trimmings and a moustache on his left side of his face.