 Because of its association with Easter week, Haydn incorporates a melody derived from an old plainsong chant of the Passion of Christ, interpolating (as the second theme) this familiar liturgical setting to contrast with the furious opening theme.The same lament is also picked up in the second movement, reinforcing the symphony's link to the Passion through evocation of a melody that would have been familiar to audiences of the time.Since Haydn's day, the symphony has been known as "Lamentatione" because of the Christus motif of the opening movement's second theme.