After his divorce, Ed Logan declared, "Man, the good ones are all taken." This little bit of wisdom came to be called "Logan's Law". However, his friend, Steve Whortleberry, discovered that "Logan's Law" wasn't absolute.
Divorce is ordinarily forbidden under the Catholic Church. Under canon law, a Catholic marriage can be dissolved through annulment, if church officials find that conditions at the time of the wedding precluded one or both parties from receiving the Sacrament of Matrimony, or in other extraordinary circumstances. When an annulment is granted, the marriage is legally declared never to have been valid to begin with, and thus never to have existed, though the legitimacy of children produced by the marriage is not brought into question as a result.
In 1527, King Henry VIII of England unsuccessfully petitioned the Pope for annulment of his marriage to Catherine of Aragon on the grounds that she had previously been the wife of his deceased older brother, and that the marriage should therefore not have taken place. (The Pope's predecessor had given Henry and Catherine a special dispensation at the time of their wedding to overcome this legal barrier. Henry's case was further weakened by Catherine's claim that she had never consummated her marriage to Arthur.)
The Pope refused Henry's request. Henry's next step was to begin the English Reformation, which made England a Protestant kingdom in 1530. The Protestant Church of England permitted divorce in cases where annulment could not be obtained, but only with explicit authorization from the monarch, now acting as head of the church. As a practical matter it was all but impossible for ordinary people to obtain a divorce, as they would be unlikely ever to attract the monarch's attention.