This papercraft is a life size Gold Saint Gemini Saga's Helmet for cosplay, from the anime series Saint Seiya, the paper model is created by Luisifer Chavez-Calderon. The size of finished model is about 320 (H) x 302 (W) x 240 (D) mm.
Saga disguised himself as the Pope and was the first Gold Saint that Masami Kurumada introduced in his manga along with Leo Aiolia, although their rank wasn't revealed until later volumes. In his first appearance, Saga presided the event in which Pegasus Seiya acquired the status of Saint. In the anime adaptation, he was introduced in identical manner, in episode 1.
Saga managed to treacherously put himself in control of the Sanctuary for many years after killing Pope Shion, the original Grand Pope of Sanctuary, by stealing his identity.
Saga is often described by other characters as someone with the kindness of an angel but with the darkness of a demon. This ambivalence ended up creating a split personality: a good Saga that was extremely loyal to Athena, and an evil one that keeps control of the body most of the time and killed the previous Pope to steal his place. When it takes control of Saga's body, his hair turns from blond to jet-black (the color schemes were altered for the anime, in which Saga's normally blue hair turned light grey). Saga's two "sides" can also communicate between themselves; in a dialogue the good Saga reproaches his evil "side" to have forced him to hurt Athena. [Source: wikia]
You can download this papercraft model here: Saint Seiya - Life Size Gemini Saga Helmet for Cosplay Free Papercraft Download