Lasso, Orlando di (1532-1594), was a Flemish composer during the Renaissance. His name in Flemish was Roland de Lassus. Orlando di Lasso is the Italian version of his name. Lasso was one of the most productive and versatile composers of his time. He wrote about 500 unaccompanied choral works called motets, which are known for their dramatic and expressive qualities. His religious works include the Passion motet Tristis est anima mea and the Seven Penitential Psalms. His nonreligious music includes choral pieces with texts in French, German, Italian, and Flemish. They range from simple songs to large-scale works for multiple choirs.