Today’s song was written by Wolfgang Amadeus Mozart (1756-1791) and is titled Alleluia. It is number 70 in the countdown of 100 classical songs, which means there are only 30 songs left.
This religious solo motet was composed when Mozart was staying in Milan during the production of his opera Lucio Silla which was being performed there in the Teatro Regio Ducale. It was written for the castrato (huh?) Venanzio Rauzzini,who had sung the part of the primo uomo Cecilio in Lucio Silla the previous year.
While waiting for the end of the run Mozart composed the motet for his singer, whose technical excellence he admired. Its first performance took place at the Theatine Church on January 17, 1773, while Rauzzini was still singing in Mozart’s opera at night. Mozart made some revisions around 1780. On May 30, 1779, a Trinity Sunday, a revised version was performed by Francesco Ceccarelli at the Holy Trinity Church in Salzburg. Another revised version was intended for Christmas. The manuscripts of the two Salzburg versions were discovered in 1978 in St. Jakob, Wasserburg am Inn.In modern times, the motet is usually sung by a female soprano.
https://en.wikipedia.org/wiki/Exsultate,_jubilate
And here is a Bach Fugue with new instrumentation:
The Write Stuff 