According to the Internet source given below, Costanzo Porta was an Italian composer, a pupil of Adrian Willaert
; became a Franciscan monk and held posts in many Italian centres - at S. Antonio, Padua, in 1565-7 and 1595-1601, Ravenna cathedral in 1567-74 and 1580-9, and Loreto in 1574-80. He was an excellent teacher, numbering Ludovico Grossio da Viadana
among his pupils. His output includes three extant books of madrigals, one of Masses, four of motets, and a further four of other liturgical music- Introits, hymns and psalms. In his Masses he aimed to make the text intelligible according to the wishes of the Council of Trent. His motets show great contrapuntal skill, while his double-choir psalms are fine products of the fashion for cori spezzati. He also published keyboard music.
||Brief biography by www.hoasm.org