Sedilia
This triple seat in the sanctuary of a church is for the celebrant, deacon, and sub-deacon at solemn Mass. It is usually a bench with a back divided into thirds. In some stone churches the sedilia are incorporated into the north wall of the sanctuary. Today, the use of a single seat for the presider with chairs or benches for assisting ministers and acolytes is more typical.
Glossary definitions provided courtesy of Church Publishing Incorporated, New York, NY,(All Rights reserved) from “An Episcopal Dictionary of the Church, A User Friendly Reference for Episcopalians,” Don S. Armentrout and Robert Boak Slocum, editors.