Editing 1800 in architecture (section)

==Buildings and structures==
{{See also|Category:Buildings and structures completed in 1800}}

===Buildings===
[[File:Honorable Society of King's Inns, Dublin.JPG|thumb|[[King's Inns]], Dublin]]
* June 30 – Replacement [[Teatro Donizetti|Teatro Riccardi]] opera house in [[Bergamo]], Lombardy, designed by [[Giovanni Francesco Lucchini]], is opened.
* November 1 – [[White House|The White House]] in [[Washington D.C.]], [[United States]], is completed. However, the [[porticoes]] are not added until [[1825 in architecture|1825]].<ref>{{cite web|work=History.com|url=http://www.history.com/this-day-in-history/john-adams-moves-into-white-house|title=John Adams moves into White House|access-date=January 22, 2015|archive-date=December 26, 2018|archive-url=https://web.archive.org/web/20181226114626/https://www.history.com/this-day-in-history/john-adams-moves-into-white-house|url-status=live}}</ref>
* The [[King's Inns]] in [[Dublin]], designed by [[James Gandon]], are completed.
* [[Santiago Metropolitan Cathedral]] in [[Chile]] is completed.
* [[East Cowes Castle]] on the [[Isle of Wight]], designed by [[John Nash (architect)|John Nash]] for his own use, is completed.
* [[Tyringham Hall]] near [[Newport Pagnell]] in England, designed by [[John Soane]], is completed.
* [[Gosford House]] in East Lothian, Scotland, is completed to the 1790 design of [[Robert Adam]] (died 1792).