Basel; Spalentor, Ausschnitt aus: Basel, von Norden, mit Randvignetten; colored <a href="https://en.wikipedia.org/wiki/Aquatint" class="extiw" title="en:Aquatint">aquatint print</a>.
<bdi><a href="https://en.wikipedia.org/wiki/en:Johann_Baptist_Isenring" class="extiw" title="w:en:Johann Baptist Isenring"><span title="photographer (1796-1860)">Johann Baptist Isenring</span></a>
</bdi>
<a rel="nofollow" class="external text" href="http://www.helveticarchives.ch/detail.aspx?ID=478327">Helveticarchives</a>; Swiss National Library, Prints and Drawings Department