"Treulich geführt" (WWV 75, 1848) is the famous Bridal Chorus from Wagner's opera Lohengrin, sung as the wedding procession enters in Act III, and has become universally known as the "Wedding March" played at the entrance of the bride. Wagner's original SATB choral setting, as presented here, conveys the solemn and ceremonial grandeur of the opera's wedding scene.
Source
Public Domain