The Berghaus-Plan, first Potsdam citymap with house numbers
<bdi><a href="https://en.wikipedia.org/wiki/en:Heinrich_Berghaus" class="extiw" title="w:en:Heinrich Berghaus"><span title="German geographer">Heinrich Berghaus</span></a>
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1840<div style="display: none;">date QS:P571,+1840-00-00T00:00:00Z/9</div>
Eigenes Archiv