Demetrius of Amphipolis (Greek: ÃÂ÷üîÃÂÃÂùÿàὠá¼ÂüÃÂùÃÂÿûïÃÂ÷ÃÂ; fl. 4th century BC) was one of Plato's students. He is perhaps identical with the person mentioned in Plato's Testament as one of the executors of his last will.