In creating the world of The Eagle, the costume and production designers paid attention to every little detail, from masks to make up.
When Esca (Jamie Bell) pushed into the coliseum to fight, the gladiator dons a stark and frightening double-faced mask. Gladiators often donned such masks to hide their own identity, and the double-faced look, a common motif, was, explains costume designer Michael O'Connor, “inspired by the Roman god Janus known for looking both ways,” both forward and back in time. The mask created for the film was made of metal and “has two faces, one still and one with a slight grimace. It was organically designed with the armourer.”