Lycia's king, Iobates, ordered a young warrior named Bellerophon to slay the chimera as a favor to a neighboring king, Proetus, who wanted Bellerophon dead.

WSJ: The Imaginary Made Nearly Read | The Chimera of Arezzo | Masterpiece by Judith H. Dobrzynski

But, riding his winged horse, Pegasus, Bellerophon instead emerged victorious from his battle with the beast (winning the hand of Iobates' daughter and eventually his kingdom).

WSJ: The Imaginary Made Nearly Read | The Chimera of Arezzo | Masterpiece by Judith H. Dobrzynski