Citation Hunt

The Wikipedia snippet below is not backed by a reliable source. Can you find one?

Click I got this! to go to Wikipedia and fix the snippet, or Next! to see another one. Good luck!

In page Slavery in medieval Europe:

This text has been unreferenced on Wikipedia for a very long time. If you can't find a source, be bold and remove it!

"

Slavery was practiced in various forms in Europe during the Middle Ages, alongside imprisonment, serfdom and other forms of bondage. Slaves were used for agricultural and craft work as well as for domestic and military service.[1][2][3][4] For most of that time, the sale of Christian slaves to non-Christians was banned.[citation needed] In the pactum Lotharii of 840 between Venice and the Carolingian Empire, Venice promised not to buy Christian slaves in the Empire, and not to sell Christian slaves to Muslims.[2][5][6] The Church prohibited the export of Christian slaves to non-Christian lands, for example in the Council of Koblenz in 922, the Council of London in 1102, and the Council of Armagh in 1171.[7]