Year 1590 was the approximate peak year of the late Italian madrigal style, as represented by Gesualdo, Luzzaschi, Monteverdi, Marenzio, Monte and others.
The serpent is invented by Canon Edmé Guillaume in Auxerre, France – it was a common instrument in Western European churches for the next several hundred years.
Orlande de Lassus, Franco-Flemish composer, publishes Neue teutsche, unnd etliche frantzösische Gesäng, a collection of secular songs for six voices, in Munich
Claudio Monteverdi – Il secondo libro de madrigali a cinque voci di Claudio Monteverde Cremonese discepolo del Sig.r Ingegneri – (second book of madrigalsa5) (published in Venice).