Lity in Eastern Christianity

The Lity or Litiyá (Greek: Λιτή(Liti), from litomai, "a fervent prayer") is a festive religious procession, followed by intercessions, which augments great vespers (or, a few times a year, great compline) in the Eastern Orthodox and Byzantine Catholic churches on important feast days (and, at least according to the written rubrics, any time there is an all-night vigil). Following a lity is another liturgical action, an artoklasia, and either of these terms may be used to describe both liturgical actions collectively.