The Teatro Filarmonico in Verona is destroyed by fire, as a result of a torch being left behind in the box of a nobleman after a performance. It is rebuilt in 1754.

The Teatro Filarmonico is the main opera theater in Verona, Italy, and is one of the leading opera houses in Europe. The Teatro Filarmonico is property of the Accademia Filarmonica di Verona. Having been built in 1716, and later rebuilt after a fire of January 21, 1749, and again after the allied bombing of February 23, 1945.

January 21 is the 21st day of the year in the Gregorian calendar; 344 days remain until the end of the year.