The "Lysander Victory Dedication" is a dedicatory epigram by the poet Ion of Samos, composed around 405 BCE to commemorate the Spartan naval victory at Aegospotami. Written in Greek verse employing a mixture of literary Ionic and Doric dialect, the poem was originally inscribed on a victory monument erected by the Spartan commander Lysander at the sanctuary of Delphi. It celebrates the decisive battle that ended the Peloponnesian War and marks the downfall of Athenian power, serving as both a religious offering and a public record of Spartan triumph. The work is known today not from the original stone but through three fragmentary passages preserved by later Greek authors, primarily the historian Diodorus Siculus and the geographer Pausanias. The epigram is a historical document illustrating the commemorative practices and political propaganda of its era. It was crafted to immortalize Lysander's achievement and to honour the gods with spoils from the victory, situating it within the long tradition of Panhellenic victory monuments.