Lucius Caesetius Flavius (fl. 1st century BC) was a Roman politician and tribune of the people (tribunus plebis). Ancient Rome was a Civilization that grew out of a small agricultural community founded on the Italian Peninsula as early as the 10th century BC Tribune (from the Latin: tribunus; Byzantine Greek form τριβούνος) was a title shared by 2–3 elected magistracies in the He is best known for his involvement in the diadem incident just before the assassination of Julius Caesar. A diadem is a type of crown, specifically an ornamental headband worn by Eastern monarchs and others as a badge of royalty
As Caesar's power grew, someone placed a diadem on the statue of Caesar on the Rostra, implying he was now King. The Rostra or Rostra Vetera was the platform located within the Comitium of the Roman Forum beside the Curia from which Orators Two of the tribunes, Flavius and Gaius Epidius Marcellus, removed it. The fear of Caesar becoming autocrat thus ending the Roman Republic, grew stronger when someone placed a diadem on the statue of Caesar on the Rostra. Soon afterward, Flavius and Marcellus had citizens arrested after they called out the title Rex to Caesar as he passed by on the streets of Rome. Now seeing his supporters threatened, Caesar acted harshly. He ordered those arrested to be released, and instead took the tribunes before the Senate and had them stripped of their positions as tribunes and senators. The Roman Senate was a political institution in Ancient Rome. 
Plutarch told that as the tribunes arrested people for saluting Caesar as King, crowds applauded, calling them Brutuses -- not after Marcus Junius Brutus, not yet the assassin of Caesar, but after Lucius Junius Brutus, a possibly apocryphal figure who had led a coup against the despotic last king, Tarquin the Proud, thereby founding the Roman Republic. Lucius Mestrius Plutarchus ( Greek: Μέστριος Πλούταρχος c Marcus Junius Brutus (85&ndash42 BC or Quintus Servilius Caepio Brutus was a Roman senator of the late Roman Republic. Lucius Junius Brutus (or Lucius Iunius Brutus) was the founder of the Roman Republic and traditionally one of the first Consuls in 509 BC Lucius Tarquinius Superbus (also called Tarquin the Proud or Tarquin II) was the last of the seven Legendary Kings of Rome, son of Tarquinius The Roman Republic was the phase of the ancient Roman civilization characterized by a Republican form of government a period which began with the overthrow of the He also notes that Caesar insulted the tribunes in a speech as he removed them from office, "and in speaking against them he insulted the people at the same time". 
He appears in the William Shakespeare biographical play Julius Caesar as simply "Flavius". William Shakespeare ( baptised Julius Caesar is a tragedy by William Shakespeare, believed to have been written in 1599 As in history, Flavius and his fellow tribune (here named "Marullus" or "Murellus") are punished for removing decorations from statues of Caesar during a parade.