The practice of Gladiatorial battles spread fast in Roman culture. Its beginning is traced back again to the munus, i.e., the practice of rich and famous characters of sponsoring public performances during spiritual vacations, festivals and events. The Emperor Vespasianus built the biggest amphitheater on earth for gladiatorial games: the Flavian Amphiteatre, better known as the Coliseum. The battles occurred frequently happened between couples of various gladiator kinds for instance the myrmillons, the thracians, the secutores, the retiarii, each characterized by their own equipment and fighting style.