Map of <a href="https://en.wikipedia.org/wiki/en:Oslo" class="extiw" title="w:en:Oslo">w:en:Oslo</a>, <a href="https://en.wikipedia.org/wiki/en:Norway" class="extiw" title="w:en:Norway">Norway</a>, city map from 1794 and "bymarka" from 1795-1796. The survey was conducted after order by "Christiania magistrat og borgerrepresentasjonen". The <a href="https://en.wikipedia.org/wiki/en:Akershus_Fortress" class="extiw" title="w:en:Akershus Fortress">w:en:Akershus Fortress</a> is added later. Older inlay showing the city as it was in 1650.
<bdi><a href="https://www.wikidata.org/wiki/Q18176470" class="extiw" title="d:Q18176470"><span title="Officer, surveyor and architect in Oslo, Norway">Patroclus von Hirsch</span></a>
</bdi>
between 1794 and 1796 <div style="display: none;">date QS:P,+1794-00-00T00:00:00Z/8,P1319,+1794-00-00T00:00:00Z/9,P1326,+1796-00-00T00:00:00Z/9</div>
Email from Oslo byarkiv (Same files in lesser resolution can be found on <a rel="nofollow" class="external text" href="http://www.byarkivet.oslo.kommune.no/article75121-961.html">Bykart fra 1794</a>)