Charlemagne, King of the Franks (768–814) Jules-Joseph Lefebvre (1836-1911)

The picture has something of this: crown, god, ancient, gold, decoration, spirituality, symbol, people, religious belief, culture, traditional, sacred, saint, worship, ornate, temple.
Perhaps it’s a painting of a man with a beard wearing a crown and holding a piece of paper in his right hand and a book in his left hand.