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In page Slavery in medieval Europe:

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Slavery began to be replaced by a feudal-style tenant farmer economy wherein free men tied to the land worked farms for a lord reducing the need for slaves[4][1] The Norwegian law code from 1274, Landslov (Land’s law), does not mention slaves, but former slaves. Thus it seems like slavery was abolished in Norway by this time.[citation needed] In Denmark, slavery was gradually replaced by serfdom (hoveriet) in the 13th-century, and in Sweden, slavery was abolished in 1334 and not replaced with serfdom, which never excisted in Sweden.[7]