Cantoris

Evensong in York Minster, as seen from beside the main altar; notice the choir arrangement into decani or Dean's side (as seen here, the right side) and cantoris or Cantor's side (here, the left side).

Cantoris (Latin: "of the cantor"; /kænˈtɔːrɪs/) is the side of a church choir occupied by the Cantor. In English churches this is typically the choir stalls on the north side of the chancel, although there are some notable exceptions, such as Durham Cathedral, Ely Cathedral, Carlisle Cathedral and Southwell Minster. The opposite side is known as Decani.

From the perspective of the congregation facing the altar, which by convention is regarded as liturgical East, this would be on the LEFT (liturgical North) side.

While the cantoris side of the choir corresponds to the Gospel side of the altar (so called from the custom of reading the Epistle from the south end of the altar, and the Gospel from the north end of the altar), cantoris and decani properly refer only to sides of the choir, not to the sides of the altar.