Grove Music Online
The principal genre of non-liturgical religious song in Italy during the late Middle Ages and Renaissance. In its monophonic form, the lauda also constitutes the primary Italian repertory of late medieval vernacular song, and is distinguished from most neighbouring repertories in its strictly urban, non-courtly context. The religious lauda endured into the 19th century, and extant repertory remains an important source of popular Italian texts and music.
Wilson, Blake. "Lauda." Grove Music Online. Oxford Music Online. Oxford University Press, 2001.