Allegri

/ (Italian alˈleɡrɪ) /

noun

Gregorio. 1582–1652, Italian composer and singer. His compositions include a Miserere for nine voices

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Examples from the Web for allegri

On this first day, two compositions of Allegri and Baini were given, and each of them repeated once.
Louis Spohr's Autobiography|Louis Spohr
As for the Allegri di Bravura, I must make allowance for yours.
Beethoven's Letters 1790-1826 Vol. 2|Lady Wallace
Thus Mozart, at two hearings, was able to note down the score of Allegri's Miserere.
The Catholic World; Vol. IV.; October, 1866, to March, 1867.|E. Rameur
As Allegri composed only one verse, on which the rest are chanted, I heard the three compositions which they gave on that day.
Letters of Felix Mendelssohn Bartholdy from Italy and Switzerland|Felix Mendelssohn-Bartholdy

Mozart is reported to have learned Allegri's Miserere by ear, and to have written it down from memory.
Ave Roma Immortalis, Vol. 2|Francis Marion Crawford