The landlord may wish to search on the Internet by himself. There are many versions, so just choose the one you like.

There are two famous "Wedding March". One is the prelude to the fifth act of Mendelssohn's overture "A Midsummer Night's Dream", and the other is a mixed chorus "Wedding Chorus" at the beginning of the third act of Wagner's opera "lohengrin", which was named "Wedding March" because it is often used as wedding music, and was later adapted into orchestral music. The former is cheerful and passionate, while the latter is solemn. According to western tradition, the bride will play Wagner's "Wedding March" when she enters the venue. When the couple walks out of the church, they will play Mendelssohn's Wedding March.