Editing 1780 in architecture (section)

===Buildings===
* April 17 – [[Grand Théâtre de Bordeaux]] in France, designed by [[Victor Louis]] is inaugurated.
* June 24 – [[Chesme Church]] in [[Saint Petersburg]], designed by [[Yury Felten]], is consecrated.
* [[Assumption Cathedral, Kharkiv]], Ukraine, is consecrated.
* [[Fragrant Hills Pagoda]] in China is completed.
* [[Kashi Vishwanath Temple]] on the [[Ganges]] in [[Varanasi]], [[Uttar Pradesh]], is built.
* [[Xumi Fushou Temple]] in [[Chengde Mountain Resort]], China, is built.
* [[Royal Villa of Monza]] in Lombardy, designed by [[Giuseppe Piermarini]], is completed.
* Reconstruction of [[Palazzo Tucci]] in [[Lucca]], Tuscany by Ottaviano Diodati is commissioned.<ref>{{cite book|url=https://books.google.com/books?id=_68rGhQZHPgC|title=Le dimore di Lucca: l'arte di abitare i palazzi di una capitale dal Medioevo allo Stato Unitario|editor=Daniele, Emilia|year=2007|pages=50–52|isbn=9788860551757}}</ref>