Oslo

===17th century===
Over the years, fires destroyed significant parts of the city multiple times, as many of the city's buildings were built entirely of wood. After the fourteenth calamity, in 1624, which lasted for three days, [[Christian IV of Denmark]] decided that the old city should not be rebuilt again. His men built a network of roads on the other side of the bay in Akershagen near [[Akershus Castle]]. He demanded that all citizens move their shops and workplaces to the newly built city of "Christiania", named in his honor.<ref>{{Cite web |title=Christiania - Norsk Folkemuseum |url=https://norskfolkemuseum.no/en/christiania |access-date=2023-08-21 |website=norskfolkemuseum.no |language=en}}</ref> The part of the city built starting in 1624 is now often called ''{{Wikidata fallback link|Q11982577}}''<!--[[Kvadraturen (Oslo)|Kvadraturen]]--> because of its orthogonal layout in regular, square blocks.<ref>{{cite book |year=2000 |title=Oslo byleksikon |isbn=9788257308155 |place=Oslo |publisher=Kunnskapsforl. |url=http://urn.nb.no/URN:NBN:no-nb_digibok_2009011300087 |access-date=27 February 2017 |archive-date=28 July 2020 |archive-url=https://web.archive.org/web/20200728025621/https://www.nb.no/items/URN:NBN:no-nb_digibok_2009011300087 |url-status=live}}</ref> [[Anatomigården]] is a historic timber framing house located on the north side of Christiania Torv; it was built in 1640.

The transformation of Christiania went slowly for the first hundred years. However, outside of the city at [[Vaterland, Norway|Vaterland]], [[Grønland, Oslo|Grønland]], and the [[Old Town, Oslo|old town of Oslo]], a new, unmanaged part of the city arose populated by citizens of lower class status.{{cn|date=March 2023}}

The last [[Black Death]] outbreak in Oslo occurred in 1654.<ref>{{cite web |url=http://www.dnms.no/index.php?seks_id=110569&a=1 |title=DNMS.NO : Michael: 2005 : 03/2005 : Book review: Black Death and hard facts |publisher=Norwegian Medical Society |author=Øivind Larsen |access-date=11 March 2014 |archive-date=11 March 2014 |archive-url=https://web.archive.org/web/20140311050728/http://www.dnms.no/index.php?seks_id=110569&a=1 |url-status=live}}</ref>