Paten

Not to be confused with Platen or Diskos (record label).
Paten, 13th century, now part of the Metropolitan Museum of Art Ensemble for the celebration of the Eucharist
Derrynaflan Paten, part of an 8th- or 9th-century communion set found in County Tipperary, Ireland

A paten or diskos is a small plate, used during the Mass. It is generally used during the liturgy itself, while the reserved sacrament are stored in the tabernacle in a ciborium.