Kristofers landslag ('The Country Law of Christopher') was a code of law passed under Christopher of Bavaria as king of Sweden in 1442.
It was an amended version of the original national law, the Magnus Erikssons landslag from circa 1350.
In 1608, the Kristofers landslag was reprinted on the order of Charles IX of Sweden, which solved the question about which law to use.
[1] The 1608 biblical amendments to the Kristofers landslag, made the law seem draconian and resulted in cruel punishments for notably sexually related offences: however, as the local courts had the obligation to present their sentences to the higher courts, the biblical sentences were in practice seldom performed, as it became normal procedure for the higher courts to revoke them by claiming mitigating circumstances.
[2] The Kristofers landslag was used uncontested in Sweden from 1608 until the Civil Code of 1734.