11th century in law

thumb|upright=1.5|Image of a murder by a minor and the subsequent paying of wergild, in Heidelberger Sachsenspiegel Cgm 165 fol. 11r. This is one of the only images of wergild payment from the Middle Ages.

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The allelengyon () was a tax established in 1002 by the Byzantine Emperor Basil II, requiring the wealthiest landowners to pay the tax debts owed by their poorer neighbours. It relied on a concept long extant in Hellenistic and Byzantine law, but was abolished by Romanos III Argyros in 1028.

Law regarding feudal contracts in the Holy Roman Empire

judge in charge of a Scottish sheriffdom with judicial, quasi-judicial, and administrative responsibilities