Complex sentence: He recalls the one who ordered the act was named Ranuccio Tommasoni; this is a reference to a man by the same name who was murdered by the historical Caravaggio in 1606.
Split into simpler sentences: He recalls the one who ordered the act was named Ranuccio Tommasoni. This is a reference to a man by the same name who was murdered by the historical Caravaggio in 1606.