Caligula

Gaius Julius Caesar Augustus Germanicus, more commonly known as Caligula, was the third Roman emperor, reigning from 16 March 37 until his assassination (24th january 41).

His assassination was performed by the Assassin Leonius, who stabbed Caligula with a knife. Historically, he is recorded to have been assassinated by a group of conspirators in a way similar to Julius Caesar, with many stab wounds. Due to him apparently being assassinated by an assassin, he is implied to be allied to or is a Templar.