Gaudete (English pronunciation: /ˈɡaʊdeɪteɪ/; Ecclesiastical Latin: [gawˈdetɛ] "rejoice" in Latin) is a sacred Christmas carol, which is thought to have been composed in the 16th century, but could easily have existed as a monophonic hymn in the late medieval period, with polyphonic Alto, Tenor, and Bass parts added during the 15th century, particularly due to its Medieval Latin lyrics. The song was published in Piae Cantiones, a collection of Finnish/Swedish sacred songs published in 1582. No music is given for the verses, but the standard tune comes from older liturgical books.