The Sudarium of Oviedo, or Shroud of Oviedo, is a bloodstained piece of cloth measuring c. 84 x 53 cm (33 x 21 inches) kept in the Cámara Santa of the Cathedral of San Salvador, Oviedo, Spain. The Sudarium (Latin for sweat cloth) is claimed to be the cloth wrapped around the head of Jesus Christ after he died, as described in John 20:6-7
The small chapel housing it was built specifically for the cloth by King Alfonso II of Asturias in AD 840; the Arca Santa is an elaborate reliquary chest with a Romanesque metal frontal for the storage of the Sudarium and other relics. The Sudarium is displayed to the public three times a year: Good Friday, the Feast of the Triumph of the Cross on 14 September, and its octave on 21 September.
The Sudarium is severely soiled and crumpled, with dark flecks that are symmetrically arranged but form no image, unlike the markings on the Shroud of Turin. No such object is mentioned in accounts of the entombment of Jesus, but a face cloth is mentioned as having been present in the empty tomb in John 20:6-7. Outside of the Bible the Sudarium is first mentioned in 570 AD by Antoninus of Piacenza, who writes that the Sudarium was being cared for in a cave near the monastery of Saint Mark, in the vicinity of Jerusalem.