Round bronze door knocker with a movable ring in the snout of a lion's head on the west portal of St. Nicholas Cathedral in Fribourg, Switzerland. Probably this door knocker and the second one of the same shape on the other door wing were made for the original doors.
<div class="fn value">
<a href="//commons.wikimedia.org/wiki/User:Matutinho" title="User:Matutinho">Martin Thurnherr</a></div>
<span class="int-own-work" lang="en">Own work</span>