In ecclesiastical architecture, sedilia (the plural of Lat. sedile, seat) are stone seats, found on the liturgical south side of an altar, often in the chancel, for the use during Mass for the officiating priest and his assistants, the deacon and sub-deacon.

Sedilia
SEDILIA
Sedilia
Rendering of a Sedilia or Piscina
Rendering of a Sedilia or Piscina
The Englishness of English Sedilia
Los "sedilia"marmóreos del Teatro de Pompeyo y su reflejo en los teatros de la Bética
Dominican Friary, Rathfran, County Mayo - Sedilia and Piscina
Ardfert, county Kerry, Cathedral, detail of Sedilia in south wall
Holycross Abbey, Thurles, County Tipperary - Piscina and Sedilia
Augustinian Friary, Ballinrobe, County Mayo - Piscina and Sedilia
Carmelite/Augustinian Priory, Burriscarra, County Mayo - Piscina and Sedilia
Lislaughtin Franciscan Friary, interior chancel, south wall, sedilia, jamb, arch, hood and architrave