One thing that has changed since the 14th century is that the wedding was performed at the church door instead of inside the church. I don't have a source for you, but the father was present for more of the vows before "giving away" the bride than is customary in weddings today.
You have to consider the history time-line of orthodox Christianity, Catholicism, Judaism, and protestantism. Marriage and the commitment to the church changes with each break off from orthodoxy. Here's a page that can give you a little historical background of wedding vows back to the time you're researching. You can go from there to other searches to find more answers.