Originally adapted into an anime in 1986, Saint Seiya tells the story of five knights, known as Saints, who each wear an armor or Cloth that bears the imprint of a guardian constellation. The stories of these Saints, created by Masami Kurumada, follow the heroes as they fulfill their divine mission to protect and defend the reincarnation of Athena against a pantheon of Gods, each with their own plan for dominion over Earth and humanity. Saint Seiya focuses on these cosmic quests and battles and has captivated audiences worldwide.
Source:https://www.cbr.com/saint-seiya-where-spin-offs-fit-chronologically/