Act I. Before the atrium of the temple of Diana. To priestesses and

Greek maidens, _Iphigénie_ tells of her dream that misfortune has come to her family in the distant country of her birth. _Thoas_, entering, calls for a human sacrifice to ward off danger that has been foretold to him. Some of his people, hastily coming upon the scene, bring with them as captives _Orestes_ and _Pylades_, Greek youths who have landed upon the coast. They report that _Orestes_ constantly speaks of having committed a crime and of being pursued by Furies.