His most notable work is the Opus musicum (1590), a collection of motets for the entire year.
What's more, later that same year he published the first edition of what came to be the magnum opus of the entire counterculture, the Whole Earth Catalog – a book that some people, Turner included, believed changed the world.
Confluence – the Trilogy (Gollancz, £25) may well be the magnum opus of the award- winning author.
This was going to be the magnum opus of all flamewar-ending comments.
Other Age of Empires-like games tried to follow suit, though few have touched what many consider to be the magnum opus of the series.
Békésy's book Experiments in Hearing, published in 1960, is the magnum opus of the modern theory of the ear.
Schubert, "The Complete Songs" (Hyperion): This landmark release, recorded over the course of thirteen years, is the magnum opus of the superb pianist and song scholar Graham Johnson, who provides watercolored accompaniments to performances by such singers as Janet Baker, Christine Schäfer, Peter Schreier, and Ian Bostridge.
John Ware's Panorama in 2004, about the Today programme's reporting of what Dr David Kelly did or did not say about weapons of mass destruction in Iraq, is the magnum opus of this genre, but there are many examples.
The Babylonian Talmud is the magnum opus of early Jewish tradition, weaving several centuries of law and anecdote in highly stylized tapestries of argument, built on a matrix of the very oldest precepts in rabbinic religion.
Defying the filmic realism of console games with Cubist graphics, Stardew Valley is the magnum opus of prodigy designer Mr. Barone, whose nom de jeux is ConcernedApe.
