I always recommend starting by separating the ceremony from the party. At the ceremony, classical themes are suggested such as the “Hallelujah” of Haendel’s Messiah or his “Canticorum”, “Lascia ch’io Pianga” or “Heil, heil, heil”. Also the theme “Die Himmel Erzählen” by Haydn, his work the Creation, the “Ave María” by Schubert, the “Gloria” by...