Analysis of information sources in references of the Wikipedia article "Monreale" in English language version.
The church did not sanction marriage younger than these several ages [20 for men, 18 for women], save in exceptional cases; and anyone who assisted at the marriage of a girl below the age of 18, without the consent of her parents or guardians, was imprisoned for life and forfeited all he had. This law, however, was frequently broken in remote places, and especially about Palermo, where "the marriages of Monreale" have passed into a proverb. When a young girl, say of sixteen, marries and has a good childbirth, they say "She has been to Monreale".