Organum

All this countrey was wont to be called Organum: and the people thereof had their proper language, and their peculiar kinde of writing.

The iournal of frier William de Rubruquis a French man of the order of the minorite friers, vnto the East parts of the worlde. An. Dom. 1253. 2004

All this countrey was wont to be called Organum: and the people thereof had their proper language, and their peculiar kinde of writing.

The Principal Navigations, Voyages, Traffiques and Discoveries of the English Nation 2003

An epistle in praise of tobacco and coffee, prefixed to a little treatise entitled Organum Salutis.

All About Coffee 1909

Diderot's answer to the question is an anticipation of the main position of the famous little book which appeared fifteen years afterwards, and which has been well described as the Organum of æsthetic cultivation.

Diderot and the Encyclopædists Volume II. John Morley 1880

The desire for harmony, that is, the simultaneous sounding with the cantus firmus, tenor, or theme, of one or more voices on different intervals, first found expression in the so-called diaphony or "Organum" of Hucbald (840-930 or 932).

The Catholic Encyclopedia, Volume 4: Clandestinity-Diocesan Chancery 1840-1916 1913

The Organum Ensemble was founded in 1982 by Marcel Pérès at Sénanque Abbay France and has been supported since 1984 by the Fondation Royaumont.

Archive 2009-05-01 bls 2009

The Organum Ensemble was founded in 1982 by Marcel Pérès at Sénanque Abbay France and has been supported since 1984 by the Fondation Royaumont.

Archive 2009-06-01 bls 2009

The Organum Ensemble was founded in 1982 by Marcel Pérès at Sénanque Abbay France and has been supported since 1984 by the Fondation Royaumont.

Archive 2009-04-01 bls 2009

The Organum Ensemble was founded in 1982 by Marcel Pérès at Sénanque Abbay France and has been supported since 1984 by the Fondation Royaumont.

Archive 2009-03-01 bls 2009

Here's the "Ensemble Organum" version of the Gloria from that page:

Archive 2009-10-01 bls 2009