Allegri: Brief biography from Classical Net's Basic Repertoire List with link to his Miserere.
Allegri's Miserere: Notes on the work and on performance by the Sistine Chapel Choir.
Allegri, Gregorio: Biography from the Catholic Encyclopedia.
Allegri, Gregorio: Biography noting his positions as singer, composer, and maestro di cappella with a focus on his Miserere. From the Grove Concise Dictionary of Music entry at WQXR radio.
Allegri, Gregorio (c. 1582 - 1652), Italy: Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays
Classical Music Archives: Allegri: Sound files in MIDI format.
Gregorio Allegri: Caricature, brief comments on church music, and Naxos discography.
Gregorio Allegri: Wikipedia article with summary of life and works, education, benefices and appointments, and internal references to related people and topics.
Gregorio Allegri: Karadar biography, works, and links.
Gregorio Allegri: A Potted Biography: Brief life history with links to music and analysis.