God and possessing superhuman charisma and fighting ability, arrives to unite and strengthen the people, and to defend the innocent noblewoman Elsa from a false accusation of murder, but he imposes a condition: the people must follow him without knowing his identity. Elsa in particular must never ask his name, or his heritage, or his origin. The conspirators attempt to undermine her faith in her rescuer, to create doubt among the people, and to force him to leave. Act I King Henry the Fowler has arrived in Brabant, where he has assembled the German tribes in order to expel the marauding Hungarians from his dominions. He also needs to settle a dispute involving the disappearance of the child-Duke Gottfried of Brabant. The Duke's guardian, Count Friedrich von Telramund, has accused the Duke's older sister, Elsa, of murdering her brother in order to become Duchess of Brabant. Telramund calls upon the King to punish Elsa and to make him the new Duke of Brabant. The King calls for Elsa to answer Telramund's accusation. Elsa does not answer the King's inquiries, only lamenting her brother's fate ("Einsam in trüben Tagen"). The King declares that he cannot resolve the matter and will leave it to God's judgment through ordeal by combat. Telramund, a strong and seasoned warrior, agrees enthusiastically. When the King asks Elsa who shall be her champion, Elsa describes a knight she has beheld in her dreams ("Des Ritters will ich wahren"). Twice the Herald calls for a champion to step forward, but gets no response. Elsa kneels and prays that God may send her champion to her. A boat drawn by a swan appears on the river and in it stands a knight in shining armour. He disembarks, dismisses the swan, respectfully greets the king, and asks Elsa if she will have him as her champion and marry him. Elsa kneels in front of him and places her honour in his keeping. He asks only one thing in return for his service: Elsa must never ask him his name or where he has come from. Elsa agrees to this ("Wenn ich im Kampfe für dich siege"). Telramund's supporters advise him to withdraw because he cannot prevail against the Knight's powers, but he proudly refuses. The chorus prays to God for victory for the one whose cause is just. Ortrud, Telramund's wife, does not join the prayer, but privately expresses confidence