This infographic is only looking at the question from the perspective of who the participants in the marriage are, and not other issues which might affect validity (e.g. intent, coercion, etc).
[See also: Pope Benedict XVI’s Parents Met Through This Unusual Classified Ad]
[See also: The Worst Result of the SCOTUS Marriage Decision Won’t Be Persecution]
[See also: The Little-Known 9th C. Marriage Crisis & the “Great” Pope Who Stood Firm]
[See also: The Secret to a Happy Marriage, According to Pope Francis]