Seoul

==== Late period ====
[[File:Korea-Joseon map-Suseon jeondo.jpg|left|thumb|200px|Map of Seoul created 1825–1835 by [[Gim Jeong-ho|Kim Jeong-ho]] and designated National Treasure no 853.]]
In the late 19th century, after hundreds of years of isolation, Seoul opened its gates to foreigners and began to modernize. Seoul became the first city in [[East Asia]] to introduce electricity in the royal palace, built by the [[Edison Illuminating Company]]<ref>{{cite web|url=http://www.ieeeghn.org/wiki/images/8/85/Nam-Early_History.pdf|title=Early History of Electrical Engineering in Korea: Edison and First Electric Lighting in the Kingdom of Corea|author=Nam Moon Hyon|work=Promoting the History of EE Jan 23–26, 2000|publisher=Institute of Electrical and Electronics Engineers|access-date=7 February 2014|archive-date=22 February 2014|archive-url=https://web.archive.org/web/20140222020732/http://www.ieeeghn.org/wiki/images/8/85/Nam-Early_History.pdf|url-status=live}}</ref> and a decade later Seoul also implemented electrical street lights.<ref>{{cite book|url=https://books.google.com/books?id=cbRhAQAAQBAJ|title=A History of Korea|author=Kyung Moon Hwang|publisher=Palgrave Macmillan|page=142|year=2010|isbn=9780230364523|access-date=9 November 2015|archive-date=25 January 2016|archive-url=https://web.archive.org/web/20160125042515/https://books.google.com/books?id=cbRhAQAAQBAJ|url-status=live}}</ref>