The amphitheater was an elliptical building with an arena in the center and with tiers of seats leading up all around. The Coliseum at Rome was the greatest of all, being computed to have contained 87,000 seats. In the amphitheater were held the gladiatorial fights. Just how these originated is unknown but the first public exhibition of gladiators at Rome was given in 264 B. C., by the brothers Marcus and Decimus Brutus at their father's funeral. Such continued at funerals and then they were given at other times, the number of days and number of fighters gradually increasing, till Trajan, upon his return after a victorious campaign on the Danube, gave gladiatorial games for 123 days, in which 10,000 fighters took part. The gladiators were captives, slaves, and criminals, and under the empire knights and senators and even women were enrolled among them. There were schools for the training of gladiators. Emperors, senators, and all classes of people attended these fights and although women at first were excluded, later they were admitted freely. The gladiators wore helmets and had leather coverings for their legs and they carried shields. Their weapons were the lance, dagger, sword, and rapier. There were others who used the trident and the net for entangling their opponents. They were usually matched by pairs and when one was overcome his life depended upon the people, who would turn down their thumbs for his life to be spared and upon the turning up of their thumbs the wounded gladiator was slain by his opponent. The victor received a palm crown, sometimes money, and he might be given his freedom. "These gladiatorial exhibitions proclaim the true nature of the Roman character. When the vestal virgin, the Roman matron, and the young lady could find amusement in such scenes of human slaughter, it can certainly surprise no one that the Roman character, in its constituent elements, possessed so much hardihood, and could remain such firm proof against every tender feeling of humanity. The school of blood in which the young were reared, and the old matured, was eminently calculated to form precisely the character which the Roman possessed. It is thus that the manners and customs of a people are influenced by, and in their turn, influence the character from which they originate."[197]