聖金口イオアン聖体礼儀
The Liturgy of St. John Chrysostom (, ) is an choral composition by Pyotr Ilyich Tchaikovsky, his Op. 41, composed in 1878. It consists of settings of texts taken from the Divine Liturgy of St. John Chrysostom, the most celebrated of the eucharistic services of the Eastern Orthodox Church. Tchaikovsky's setting constitutes the first "unified musical cycle" of the liturgy.