The Queen wears the Duchy of Lancaster Badge, 2015The Duchy of Lancaster is one of two royal duchies (the second being the Duchy of Cornwall) and is held in trust for the Sovereign as a source of income (as the Duchy of Cornwall provides income for The Prince of Wales). The Dukedom of Lancaster merged with the crown when Henry IV came to the throne in 1399, and the title has remained with the Sovereign ever since.
|A sketch of The Queen's brooch (via the Chorley Historical Society), left; an example of the Duchy of Lancaster coat of arms, right|
29 May 2015: Visit to Lancaster
Photos: via Getty Images, Chorley Historical Society, and Wikimedia Commons