Answer:
You didn't include the picture, but after some searching I think that 'The Barbarians' is most likely the piece of art, but again, not 100% sure :)
Photo realism. that might be false. but that’s he only realism i know
Answer:
Byzantine mosaic of Emperor Justinian and his attendants at San Vitale, Ravenna
Explanation:
Mosaic is made of tesserae, main color is gold and white, so it's bright. Justinian I is shown with halo, which is a symbol of a saint.