Composer: J.S. Bach
A loure is a French Baroque dance, also known as a slow gigue. It is written with a triple meter (as in 6/8, 3/4 or 6/4 time), sort of like a slow waltz. Having said that, the Bach Loure I have in mind here is actually in cut time (2/2), and in fact it was difficult to find recordings of. It is more correctly called a "bourree" which is another Baroque dance. In its original form it is written for solo cello (from Bach's Cello Suite No. 3, BWV 1009).
It's a cheerful little piece that works very nicely as prelude music, or even perhaps for your flowergirl, or anywhere you think it would fit in your classically-based wedding ceremony! It also comes in a variety of arrangements or adaptations for various instrumental combinations. I have played it as a piano solo, or in accompaniment with a violinist. It would also be lovely for flute and harp together, or for light organ. And acoustic guitar would be another nice version of it.