The name- medieval Latin for "garden" or "orchard"-derives from the title of a treatise by the 14th-century music theorist Marchettus of Padua, who explained that his book contains the "flowers and fruits" of the art of music.

Widely known for its interpretations of Du Fay, Ockeghem, Busnoys, Josquin, Lassus, and Palestrina, the 14-voice a cappella ensemble has performed for numerous international festivals, most recently the Festival di Musica Sacra Bressanone e Bolzano (Brixner Initiative), the Tage Alter Musik festival in Regensburg, Germany, the Flanders Festival Antwerp, and the Holland Festival Oude Muziek Utrecht. In fall 1998 Pomerium performed in Osaka, Nagoya, and Tokyo, Japan.

The ensemble has released four CD's for Deutsche Grammophon/Archiv Produktion: "A Musical Book of Hours" (Archiv Produktion 457 586-2); "Creator of the Stars: Christmas Music from Earlier Times" (Archiv Produktion 449 819-2), "The Virgin & the Temple: Motets and Plainchant by Guillaume Du Fay" (Archiv Produktion 447 773-2), and Du Fay's Mass for St. Anthony of Padua (Archiv Produktion 447 772-2); and, on the Dorian and Classic Masters labels, music by Arcadelt, Busnoys, Du Fay, Gesualdo, Marenzio, Monteverdi, Ockeghem, Wert, and Willaert.

Pomerium's most recent CDs, "Musica Vaticana," featuring music composed for the Sistine Chapel choir at the time Michelangelo was painting the Sistine Chapel ceiling, and "Carolus Maximus: Music in the Life of Charles V," were released on the Glissando/Pure Classics label in 1998 and 2000. They are distributed in the USA by Qualiton. In June 2003 Pomerium released "Josquin Desprez: Missa Hercules dux Ferrarie, Motets & Chansons," also on Glissando/Pure Classics.