Fribourg, von Südosten; Fribourg; Umrissradierung
<bdi><a href="https://en.wikipedia.org/wiki/en:Christian_von_Mechel" class="extiw" title="w:en:Christian von Mechel"><span title="Swiss engraver">Christian von Mechel</span></a>
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<a rel="nofollow" class="external text" href="http://www.helveticarchives.ch/detail.aspx?ID=480244">helveticarchives.ch</a>; Swiss National Library, Prints and Drawings Department