Jean Paul Marat
Jean Paul Marat was a leader of the Cordeliers Club (a radical group in France) along with Georges Danton. He was assassinated in 1793 by a young Girondist named Charlotte Corday, who believed that his death would end the French Revolution. Like most of the people involved in the French Revolution, he was a huge follower of Jean-Jacques Rousseau, even adopting a disheveled and unbathed appearance specifically to "live simply and according to the precepts of [Rousseau]."
La muerte de Marat by Santiago Rebull.