In Greek mythology, Athena, the daughter of Zeus, was born in full armor. By birthright the goddess of battle, she did not believe in conquest, and only fought defensive wars. Her battles with bloodthirsty gods and giants shook the very earth and seemed to last forever. On the battlefield, there were a group of youths that always surrounded and protected the goddess: the Knights of Athena! Flash forward to modern-day Greece: two Japanese tourists are shocked to see a mansized meteorite crash to the earth before them. It turns out to be young Seiya. Seiya must train harder than ever if he is to survive his match with the brutal Cassios! Whoever wins will receive the greatest prize known to man: the incredibly powerful Pegasus Cloth!
 
(Source: Viz Media)
 
Note: The chapter count includes 247 regular chapters and 2 extra chapters ("SHAKA" and “The Cygnus Story - Natassia of the Land of Ice”), other editions merge chapters into a total of 110 chapters.

Ages ago, the goddess Athena was served by fighters called Saints who channeled the power of the Cosmos within them. Now a youth named Seiya has trained to become a Saint himself by earning the mystical Cloth of Pegasus. He is joined by other Saints with Cloths of their own to fight for Athena. 
(Source: Anime News Network)

Eris is the goddess of chaos and uses the body of Elien, who is a friend of Hyoga, to revive herself. She obtains the golden apple to drain Athena's life energy to make her ressurection complete and to be able to turn the world in a place filled with chaos. But to be able to attack Eris, Seiya and his friends will first have to defeat the Ghost Knights.
 
(Source: Anime News Network)

Tags