|Covid-19|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.
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)
Antonio Montauti, Italian sculptor, medallist and possible architect (born 1685)
Approximate date - John Strahan, English architect
1740 in architecture Wikipedia
The year 1740 in architecture involved some significant events.