It was a really bad time in France, eventually ended in Robespierre being accused of treason and put forth into the Guillotine
Explanation:
The Reign of Terror, or more commonly The Terror (French: la Terreur), refers to a period of the French Revolution when, following the creation of the First French Republic, a series of massacres and numerous public executions took place in response to revolutionary fervour, anti-clerical sentiment, and spurious accusations of treason by Maximilien Robespierre and the Committee of Public Safety.
Answer: the mosaics in San Vitale differ from the rest of the structures and artworks we have seen because they are all about god being on their side and having imperial might.