Answer:
This portrait is by Diego Velazquez called Philip IV on Horseback. Equestrian portraits became common because it was believed that leaders looked especially powerful atop a large, powerful beast (horse)
Answer:
symmetry: the quality of being made up of exactly similar parts facing each other or around an axis.
Symmetry allows the observer's eye to easily view the entire painting, provides balance to the artwork, and makes the elements all exist in agreement with one another. Symmetry can also help the artist convey a message, such as one of calmness.