Allegri - - Brief biography from Classical Net's Basic Repertoire List with link to his Miserere. http://www.classical.net/music/comp.lst/allegri.html
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. http://www.wqxr.com/cgi-bin/iowa/cla/learning/grove.html?record=222
Allegri, Gregorio - - Biography from the Catholic Encyclopedia. http://www.newadvent.org/cathen/01319a.htm
Allegri, Gregorio (c. 1582 - 1652), Italy - - Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essay. http://stevenestrella.com/composers/composerfiles/allegri1652.html
Allegri's Miserere - - Notes on the work and on performance by the Sistine Chapel Choir. http://www.cappella.demon.co.uk/music/intro.html
Classical Music Archives: Allegri - - Sound files in MIDI format. http://www.classicalarchives.com/early-a.html#ALLEGRI
Gregorio Allegri - - Wikipedia article with summary of life and works, education, benefices and appointments, and internal references to related people and topics. http://en.wikipedia.org/wiki/Gregorio_Allegri
Gregorio Allegri - - Karadar biography, works, and links. http://www.karadar.it/Dictionary/allegri.html
Gregorio Allegri - - Caricature, brief comments on church music, and Naxos discography. http://www.naxos.com/composerinfo/19.htm
Gregorio Allegri: A Potted Biography - - Brief life history with links to music and analysis. http://www.cappella.demon.co.uk/music/biog.html