Katabasia or Katavasia (Greek καταβασία, from καταβαίον, "go down") is a type of hymn, and the last troparion of an ode of a canon, chanted in the Eastern Orthodox Church and those Eastern Catholic Churches which follow the Byzantine Rite. Its name is derived from the Greek word katabasia for descent, so called because the cantors used to go down from their stalls and unite in the middle of the church to sing them.