Saints

• Martyr Venantius of Camerino
  Venantius of Camerino
  Venantius of Camerino is the patron saint of Camerino, Italy. Christian tradition holds that he was a 15-year old who was tortured, and martyred by decapitation at Camerino during the persecutions of Decius...
  
   (250)
• Martyrs Peter of Lampsacus
  Peter, Andrew, Paul, and Denise
  Saints Peter, Andrew, Paul, and Denise are venerated as martyrs by the Orthodox and Catholic Churches. They were killed in the 3rd century at Lampsacus, Mysia in the Hellespont.-Martyrdom:...
  
  , Andrew, Paul, Dionysia
  Peter, Andrew, Paul, and Denise
  Saints Peter, Andrew, Paul, and Denise are venerated as martyrs by the Orthodox and Catholic Churches. They were killed in the 3rd century at Lampsacus, Mysia in the Hellespont.-Martyrdom:...
  
  , and Christina, under Decius
  Decius
  Trajan Decius , was Roman Emperor from 249 to 251. In the last year of his reign, he co-ruled with his son Herennius Etruscus until they were both killed in the Battle of Abrittus.-Early life and rise to power:...
  
   (ca.249-251)
• Martyrs Heraclius, Paulinus, and Benedimus of Athens (ca.249-251)
• Martyr Euphrasia of Nicaea (ca.303)
• Martyr Theodotus of Ancyra
  Theodotus of Ancyra (martyr)
  -Hagiography:On 18 May the Roman Martyrology says: "At Ancyra, in Galatia, the martyr Saint Theodotus and the saintly virgins Thecusa, his aunt, Alexandra, Claudia, Faina, Euphrasia, Matrona and Julitta", etc...
  
  , and with him eight virgin-martyrs:
• Alexandra, Tecusa, Claudia, Phaine, Euphrasia, Theodota, Matrona, and Julia (304)
• Hieromartyr Felix, Bishop of Spoleto, in Umbria (304)
• Martyr Dioscorus, in Cynopolis
  Cynopolis
  -Cynopolis superior:Cynopolis, the Greek name for the ancient Egyptian town Hardai in the seventeenth nome of Upper Egypt, it was home to the cult of Anubis . A burial ground for dogs is found on the opposite Nile bank near Hamatha...
  
   of Egypt (305)
• Martyr Galactia
• Martyr Julian
• Martyrs Symeon, Isaac, and Bachtisius of Persia (339)
• Hieromartyr Potamon, Bishop of Heraclea in Egypt, and Confessor (340)
• The Holy clergy and lay martyrs massacred under Emperor Valens
  Valens
  Valens was the Eastern Roman Emperor from 364 to 378. He was given the eastern half of the empire by his brother Valentinian I after the latter's accession to the throne...
  
   (364-378)
• Hieromartyr Pope John I
  Pope John I
  Pope Saint John I was Pope from 523 to 526. He was a native of Siena or the Castello di Serena, near Chiusdino. He is the first pope known to have visited Constantinople while in office....
  
   of Rome (526)
• Hieromartyr Pope Theodore I
  Pope Theodore I
  Pope Theodore I , who was pope from November 24, 642, to May 14, 649, is considered a Greek, but was born in Jerusalem. He was made a cardinal deacon, and a full cardinal by Pope John IV....
  
   of Rome (649)
• Martyrs David and Tarechan of Georgia
  Georgia (country)
  Georgia is a sovereign state in the Caucasus region of Eurasia. Located at the crossroads of Western Asia and Eastern Europe, it is bounded to the west by the Black Sea, to the north by Russia, to the southwest by Turkey, to the south by Armenia, and to the southeast by Azerbaijan. The capital of...
  
   (693)
• Martyr Merililaun (Merolilaun), a pilgrim murdered near Rheims and venerated as a martyr (8th c.)
• Saint Feredarius (Feradach mac Cormaic), Abbot of Iona
  Abbot of Iona
  The Abbot of Iona was the head of Iona Abbey during the Middle Ages and the leader of the monastic community of Iona, as well as the overlord of scores of monasteries in both Scotland and Ireland, including Durrow, Kells and, for a time, Lindisfarne...
  
   (ca.880)
• Patriarch Stephen the New of Constantinople (893)
• Saint Elgiva, Widow of King Edmund, Abbess of Shaftesbury (944)
• Saint Anastaso (Anastasia) of Leukadion (or Laucation), near the Bithinian
  Bithynia
  Bithynia was an ancient region, kingdom and Roman province in the northwest of Asia Minor, adjoining the Propontis, the Thracian Bosporus and the Euxine .-Description:...
  
   sea-shore
• Saint Martinian of Areovinthus (Areobindus, Areovinchus), monk of the church of the Theotokos of the Areovinthus quarter, Constantinople
• Hosios Stephanos the Chorabyte
• Saint John Gashkevich, Archpriest of Korma (1917)
• New Hieromartyr Michael, priest (1932)
• New Hieromartyr Damian (Damjan) Strbac, Jr., priest of Grahovo
  Grahovo
  Grahovo is a tribe in western Montenegro. It contains the village of Grahovac, which was the sight of the Battle of Grahovac.-History:In the early 17th century, during the Sanjak of Scutari, Grahovo was commanded by Mile Perin....
  
  , Serbia (1940s)
• New Hieromartyr Basil, priest (1942)

Other commemorations

• Repose of Archimandrite Macarius (Glukharev) of the Altai, missionary to the Altay
  Altay Mountains
  The Altai Mountains are a mountain range in East-Central Asia, where Russia, China, Mongolia and Kazakhstan come together, and where the rivers Irtysh and Ob have their sources. The Altai Mountains are known as the original locus of the speakers of Turkic as well as other members of the proposed...
  
   region in Siberia
  Siberia
  Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...
  
   (1847)
• Repose of Blessed Philip, founder of the Gethsemane Caves Skete of St. Sergius
  Saints Sergius and Bacchus
  Saints Sergius and Bacchus , were third century Roman soldiers who are commemorated as martyrs by the Catholic, Eastern Orthodox and Oriental Orthodox churches...
  
   Lavra
  Lavra
  In Orthodox Christianity and certain other Eastern Christian communities Lavra or Laura originally meant a cluster of cells or caves for hermits, with a church and sometimes a refectory at the center...
  
  (1869)

Sources

• May 18/31. Orthodox Calendar (PRAVOSLAVIE.RU).
• May 31 / May 18. HOLY TRINITY RUSSIAN ORTHODOX CHURCH (A parish of the Patriarchate of Moscow).
• May 18. The Roman Martyrology.
• May 18. Latin Saints of the Orthodox Patriarchate of Rome.

• 18 ΜΑΪΟΥ. ΜΕΓΑΣ ΣΥΝΑΞΑΡΙΣΤΗΣ.