The Danish ironclad <i>Rolf Krake</i> took an active part in the defence of the fortifications at Dybbøl, shelling the Prussian forces.The Danish weekly <i><a href="//commons.wikimedia.org/wiki/Category:Illustreret_Tidende" title="Category:Illustreret Tidende">Illustreret Tidende</a></i> gave an account of its actions in the April 24, 1864 issue, accompanied by this drawing by Carl Neumann.
<a href="//commons.wikimedia.org/wiki/Category:Carl_Neumann_(painter)" title="Category:Carl Neumann (painter)">Carl Neumann</a>
<i>Illustreret Tidende</i> April 24, 1864.