Symbolism of Marriage in Early Christianity and the Latin Middle Ages

In the Middle Ages everyone, it seems, entered into some form of marriage. Nuns - and even some monks - married the bridegroom Christ. Bishops married their sees. The popes, as vicars of Christ, married the universal Church. And lay people, high and low, married each other. What united these marriages was their common reference to the union of Christ and Church. Christ's marriage to the Church was...