He was specially admitted as an extraordinary member of the great priestly colleges; his name was included by the Arval Brethren in their prayers for the safety of the emperor and his house; at the games in the circus his appearance in triumphal dress contrasted significantly with the simple toga praetexta worn by Britannicus.
The official insignia of the flamen Dialis (of Jupiter), the highest of these priests, were the white cap (pileus, albogalerus), at the top of which was an olive branch and a woollen thread; the laena, a thick woollen toga praetexta woven by his wife; the sacrificial knife; and a rod to keep the people from him when on his way to offer sacrifice.
At this time the youths laid aside the boy's toga praetexta and assumed the man's toga libera or virilis (Fasti, iii.
The national cast of his genius and temper was shown by his deviating from his Greek originals, and producing at least two specimens of the fabula praetexta (national drama) one founded on the childhood of Romulus and Remus (Lupus or Alimonium Romuli et Remi), the other called Clastidium, which celebrated the victory of M.
Claudius Marcellus in 222 over the Gauls in a play called Clastidium, he gave the first specimen of the fabula praetexta in his Alimonium Romuli et Remi, based on the most national of all Roman traditions.