Orlande de Lassus (also Roland de Lassus, Orlando di Lasso, Orlandus Lassus, Orlande de Lattre or Roland de Lattre; 1532, possibly 1530 – 14 June 1594) was a Netherlandish or Franco-Flemish composer of the late Renaissance. He is today considered to be the chief representative of the mature polyphonic style of the Franco-Flemish school, and one of the three most famous and influential musicians in Europe at the end of the 16th century (the other two being Palestrina and Victoria).
Lassus was born in Mons in the County of Hainaut, Habsburg Netherlands (modern-day Belgium). Information about his early years is scanty, although some uncorroborated stories have survived, the most famous of which is that he was kidnapped three times because of the singular beauty of his singing voice. At the age of twelve, he left the Low Countries with Ferrante Gonzaga and went to Mantua, Sicily, and later Milan (from 1547 to 1549). While in Milan, he made the acquaintance of the madrigalist Spirito l'Hoste da Reggio, a formative influence on his early musical style.
He then worked as a singer and a composer for Costantino Castrioto in Naples in the early 1550s, and his first works are presumed to date from this time. Next he moved to Rome, where he worked for Cosimo I de' Medici, Grand Duke of Tuscany, who maintained a household there, and in 1553, he became maestro di cappella of the Basilica of Saint John Lateran, the ecumenical mother church of Rome and a spectacularly prestigious post indeed for a man only twenty-one years old. However, he stayed there for only a year. (Palestrina would assume this post a year later, in 1555.)