Bartolomeo Trosylho was a Portuguese

Portugal

Portugal , officially the Portuguese Republic is a country situated in southwestern Europe on the Iberian Peninsula. Portugal is the westernmost country of Europe, and is bordered by the Atlantic Ocean to the West and South and by Spain to the North and East. The Atlantic archipelagos of the...

 composer of the Renaissance

Renaissance

The Renaissance was a cultural movement that spanned roughly the 14th to the 17th century, beginning in Italy in the Late Middle Ages and later spreading to the rest of Europe. The term is also used more loosely to refer to the historical era, but since the changes of the Renaissance were not...

. He was a singer in the Royal Chapel of Dom Joao III and became master of the chapel in 1548. mestre de capela (choirmaster) at Lisbon Cathedral beginning in 1551.

One of his surviving works is the motet

Motet

In classical music, motet is a word that is applied to a number of highly varied choral musical compositions.-Etymology:The name comes either from the Latin movere, or a Latinized version of Old French mot, "word" or "verbal utterance." The Medieval Latin for "motet" is motectum, and the Italian...

Circumdederunt me. Although the heading of the ms. containing Circumdederunt me (My enemies have surrounded me) is "pro defunctis trosylho" (for the dead, Trosylho), the text is, in fact, for the Indroit for Septuagesima Sunday.