1801 in architecture

The year 1801 in architecture involved some significant events.

• 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.

• Grand Prix de Rome, architecture: (unknown).

• 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)

• September 6 – William Tyler, sculptor and architect, co-founder of the Royal Academy (born 1728)