thumb|490px|[[Administrative division of Denmark in medieval times showing herreder and sysler. The entire country was divided into herreder, shown outlined in red. Coloured areas show Jutland's syssel divisions. Zealand's four ecclesiastic sysler are not included.<!--the ones in Jutland also had temporal responsibilities-->]]
The three lands of Denmark historically formed the Danish kingdom from its unification and consolidation in the 10th century until the 17th century:
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