Eider Canal
... that the Eider Canal was first proposed as part of Ducal Holstein, built under Danish rule, conquered by Prussia, and decommissioned under the German Empire?
... that the <b id="mwAUg"><a href="./Eider_Canal" id="mwAUk" rel="mw:WikiLink" title="Eider Canal">Eider Canal</a></b> was first proposed as part of <a href="./Duke_of_Holstein-Gottorp" id="mwAUo" rel="mw:WikiLink" title="Duke of Holstein-Gottorp">Ducal Holstein</a>, built under <a href="./Denmark" id="mwAUs" rel="mw:WikiLink" title="Denmark">Danish</a> rule, conquered by <a href="./Prussia" id="mwAUw" rel="mw:WikiLink" title="Prussia">Prussia</a>, and decommissioned under the <a href="./German_Empire" id="mwAU0" rel="mw:WikiLink" title="German Empire">German Empire</a>?