Girolamo Dalla Casa (also known as Hieronymo de Udene) was an Italian composer, instrumentalist, and writer of the late Renaissance. He was a member of the Venetian School, and was perhaps more famous and influential as a performer than as a composer.
Nothing is known about his life prior to his arrival at Venice, but he was probably born at Udine sometime before the middle of the 16th century. He was first hired by the musical establishment of St Mark's Basilica on 29 January 1568, along with his two brothers, Giovanni and Nicolò, where they formed the first permanent instrumental ensemble (Arnold and Marcialis 2001). The sonorous acoustical environment of this basilica was the center of activity of the Venetians. Giovanni Gabrieliclearly had Dalla Casa's group in mind for much of his music, and the Dalla Casas are presumed to have played in many the elaborate polychoral compositions of the time.