Jan Anthonisz van Ravesteyn (and studio) – Portrait of an Officer Mauritshuis

The picture has something of this: armor, knight, sword, people, portrait, weapon, wear, warrior, soldier, war, skirmish, royalty, helmet, costume, outfit, military, Gothic.
Perhaps it’s a close up of a painting of a man in a black outfit with a large feather on his head and a large feathered hat.