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The year 1801 in architecture involved some significant events.
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Buildings and structures
Buildings
thumb|The [[Teatro Lirico Giuseppe Verdi|Teatro Nuovo in Trieste, Italy]]
- April 21 – The Teatro Nuovo in Trieste, an opera house designed by Gian Antonio Selva (interior) and Matteo Pertsch (exterior), is inaugurated.
- The New London Harbor Lighthouse in New London, Connecticut is completed.
Awards
- Grand Prix de Rome, architecture: (unknown).
Births
- May 11 – Henri Labrouste, French architect of the École des Beaux Arts (died 1875)
- June 4 – James Pennethorne, English architect and planner working in London (died 1871)
- June 5 – William Scamp, English architect working in Malta (died 1872)
- date unknown – John Semple, Irish architect (died 1882)
Deaths
- September 6 – William Tyler, sculptor and architect, co-founder of the Royal Academy (born 1728)