|Covid-19|June 30 - Replacement Teatro Riccardi opera house in Bergamo, Lombardy, designed by Giovanni Francesco Lucchini, is opened.
November 1 - The White House in Washington D.C., United States is completed. However, the porticoes are not added until 1825.
The King's Inns in Dublin, designed by James Gandon, are completed.
Santiago Metropolitan Cathedral in Chile is completed.
Birch's Views of Philadelphia published.
Grand Prix de Rome, architecture: Simon Vallot and Jean-François-Julien Mesnager.
February 27 - Robert Willis, English mechanical engineer, phonetician and architectural historian (died 1875)
August 17 - Isaiah Rogers, American architect (died 1869)
September 30 - Decimus Burton, English architect (died 1881)
December 4 - Louis Dupasquier, French architect (died 1870)
May 21 - Carl August Ehrensvärd, Swedish naval officer, painter, author and neoclassical architect (born 1745)
1800 in architecture Wikipedia
The year 1800 in architecture involved some significant events.