Demetrius of Thessaloniki

Saint Demetrius of Thessaloniki (Greek: Άγιος Δημήτριος της Θεσσαλονίκης) is a Christian martyr of the early 4th century AD.

During the Middle Ages, he came to be revered as one of the most important Orthodox military saints, often paired with Saint George. His feast day is 26 October for Eastern Orthodox Christians following the Gregorian calendar and 8 November for those following the Julian calendar. In the Roman Catholic church he is most commonly called "Demetrius of Sermium" and his memorial falls on 8 October.

Name

The spelling "Demetrius" is a romanization of the ancient Greek pronunciation; the Byzantine and Modern Greek pronunciation is romanized as Dimitrios or Demetrios. See Demetrios for more on the etymology of the name.

In Russian, he is called Димитрий Солунский ([dimitri solunski] 'Dimitri of Saloniki') and was a patron saint of the Rurik dynasty from the late 11th century on. Izyaslav I of Kiev (whose Christian name was Dimitry) founded the first East Slavic monastery dedicated to this saint. The name Dimitry is in common use.