Duke of Lancaster

Titular owner of the estates of the Duchy of Lancaster and head of the County Palatine of Lancaster

The dukedom of Lancaster is a former English peerage, created three times in the Middle Ages, which finally merged in the Crown when Henry V succeeded to the throne in 1413. Despite the extinction of the dukedom the title has continued to be used to refer to the reigning monarch of the United Kingdom in relation to the County Palatine of Lancaster and the Duchy of Lancaster, an estate held separately from the Crown Estate for the benefit of the sovereign.

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