In the liturgical traditions of Western Christianity, the Epistle side is the term used to designate the side of a church on which the Epistle is read during the Mass or Eucharist. Facing the altar, it is the right-hand side.
The Gospel side is the other side of the church, where the Gospel is read. Facing the altar, it is the left-hand side. In some places, especially if a comment is based on a romance language source, the Gospel side will be cited as the Evangelist side.
- Michael Kunzler, The Church's Liturgy, trans. Placed Murray, et al. (Berlin: LIT Verlag, 2001), p. 208.