1740 in architecture

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The year 1740 in architecture involved some significant events.

• In Ballymena (Ireland), the original Ballymena Castle burns down.

• Teatro Regio (Turin) opened.
• Teatro di Santa Maria, Florence built.
• Falkenlust Palace, Brühl, Germany, completed.
• Château d'Hérouville, France, designed by Gaudot, built.
• Duff House in Banff, Scotland, designed by William Adam, is completed.
• In Boston, Massachusetts, Faneuil Hall, the covered market, is built by Huguenot merchant Pierre Faneuil.
• Old Library, Bristol, probably designed by James Paty the Elder, built.
• Örskär lighthouse, Sweden, rebuilt in stone to the design of Carl Hårleman.
• South Wing of St Bartholomew's Hospital, London, designed by James Gibbs, built.
• Saint Sampson's Cathedral, Saint Petersburg, designed by Pietro Antonio Trezzini, consecrated
• Old First Presbyterian Church (Wilmington, Delaware) built.
• Chaurasi Khambon ki Chhatri, Bundi, Rajasthan, built.
• In Philadelphia, the house which will become known as Betsy Ross House is built.
• Church of Santa María de Loreto, Achao on the Chiloé Archipelago completed by about this date.

• Thomas Cooley, English-born architect working in Ireland (died 1784)^[1]

• Antonio Montauti, Italian sculptor, medallist and possible architect (born 1685)
• Approximate date – John Strahan, English architect