|Covid-19|The elevations of Charlotte Square in Edinburgh, Scotland, are designed by Robert Adam.
Polish architect Jakub Kubicki is ennobled.
January 6 - Théâtre Feydeau, Paris, designed by Jacques Legrand and Jacques Molinos.
November 7 - The Custom House, Dublin, Ireland, designed by James Gandon.
Bara Imambara, Lucknow, India.
Clyne Castle, Swansea, Wales, built by Richard Phillips.
Gammel Køgegård, Køge, Denmark (main house).
Buenos Aires Metropolitan Cathedral, Argentina (rebuilt).
Plaza Mayor, Madrid, remodelling by Juan de Villanueva.
Rock Castle (Hendersonville, Tennessee), United States, home of Daniel Smith.
January 14 - Thomas Oliver, English neoclassical architect (died 1857)
March 15 - Lewis Vulliamy, English architect (died 1871)
June 7 - Giacomo Moraglia, Milanese neoclassical architect (died 1860)
William Cubitt, English building and civil engineering contractor and politician (died 1863)
December 19 - Jean-François de Neufforge, Flemish architect and engraver (born 1714)
1791 in architecture Wikipedia
The year 1791 in architecture involved some significant architectural events and new buildings.