MINSTREL BLONDEL WHOSE SINGING LOCATED THE SITE OF IMPRISONMENT OF RICHARD I ON HIS WAY HOME FROM A CRUSADE.  DURNSTEIN CASTLE IS IN THE WACHAU VALLEY AND IS NOW IN RUINS.  SEE "DURNSTEIN" IN WIKIPEDIA
<a href="//commons.wikimedia.org/wiki/User:KLOTZ" title="User:KLOTZ">JERRYE &amp; ROY KLOTZ MD</a>
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<span class="int-own-work" lang="en">Own work</span>