Knights wore armor for battle. They lived by a code of conduct called chivalry.
Fight of gladiators. Floor mosaic from one of the villas. Ca. 250 C.E. Nennig on Mosel (Germany), Roman Villa.
A Provocator gladiator in a fighting stance, ready to sab his short version of a gladius into an opponent.
Gladiatores (in memoriam Peter Connolly)
Mosaic depicting a gladiators fight. The House of the Gladiators, Kourion, Cyprus.
Gladiators were the athletes that played in the Coluseum. Spectators watched gladiators fight till the death.
The Sweet Taste of Revenge by *RGUS on deviantART - 3D digital art
(4) female armor | Tumblr
Armoured knight female, seunghee lee on ArtStation at https://www.artstation.com/artwork/armoured-knight-female
Gladiator female bust Princess of warrior larp by FlambergArt