That first act sees the arrival of Henry the Fowler and a confrontation between the title character and the husband of Ortrud.  
Act Three opens in a bridal chamber before moving to the banks of the Scheldt, which is also the setting for the beginning of this work.  That first act sees the arrival of Henry the Fowler and a confrontation between the title character and the husband of Ortrud.  By the end, the title character kills said husband, Telramund, causes the reappearance of Gottfried, and vanishes though not via his swan-drawn boat.  FTP, name this romantic opera about the savior of Elsa, a Knight of the Holy Grail and son of Parsifal, a work by Richard Wagner.
Act Three opens in a bridal chamber before moving to the banks of the Scheldt, which is also the setting for the beginning of this work.  
Lohengrin