Template:May 21

Saints Constantine and Helen, Equals to the Apostles and rulers of the Roman Empire; Martyrs Polyeuctus, Victorinus, and Donatus, at Caesarea in Cappadocia; Hieromartyr Secundus and those with him, in Alexandria (356); Saint Adelphios, Bishop of Onouphis, in Byzantine Egypt (ca.362 or ca.431); Saint Boros, monk; Saint Christopher I, Patriarch of Antioch (967); Hieromartyrs Timothy, Polius and Eutychius, deacons, in Mauretania Caesariensis (Morocco); Hieromartyr Valens and Companions, Bishop who was martyred in Auxerre in France along with three children; Martyr Secundinus, in Cordoba in Spain under Diocletian (ca.306); Saint Hospitius the Hermit of Nice (Hospicius of Trier), Wonderworker (581); Saint Barrfoin (Bairrfhionn, Barrindus) of Killbarron (6th c.); Saint Gollen (Collen, Colan) of Denbighshire, a saint who has given his name to Llangollen in Wales (7th c.); Saint Isberga (Itisberga) of Aire, reputed sister of Charlemagne, nun at Aire (Aria) in the Artois, of which she is the patroness (ca.800); Saint Ageranus (Ayran, Ayrman) of Beze, a monk at Bèze in France, martyred by the Vikings (888); Saint Theobald (Thibaud), Archbishop of Vienne (970-1001); Blessed Constantine (Yaroslav), prince, and his children Saints Michael and Theodore, Wonderworkers of Murom (1129); Saint Cyril II (Kirill), Bishop of Rostov (1262); Saint Basil of Ryazan, Bishop (1295) (see also April 12); Saint Helen of Decani, Serbia, Princess (ca. 1350); Saint Cassian the Greek, monk of Uglich and Wonderworker (1504); Saint Agapitus of Markushev (Vologda) the Hieromartyr, Abbot (1584); Saint Constantine the Fool-for-Christ, of Novotorzanin, Russia (ca.16th c.); New Martyrs King Constantine Brancoveanu of Wallachia and his four sons: Constantine, Stephen, Radu, and Matthew, and his counsellor Ianache (1714) (see also August 16); Righteous New-Martyr Pachomius of Patmos (Mount Athos) (1730); Synaxis of Hieromartyrs of Karelia; Synaxis of Hieromartyrs of Ufa; Other Commemorations: Synaxis of the “Vladimir” Icon of the Most Holy Theotokos (1521) (also June 23 and August 26); Synaxis of the "Virgin of Tenderness" Icon of the Most Holy Theotokos from Pskov-Pechersk (1524) (also June 23, August 26, October 7 and the 7th Sunday of Pascha); Uncovering of the relics (1998) of St. Andrew Ogorodnikov, Fool-for-Christ of Simbirsk (1841); Repose of Elena Pavlova of Chepel, Kharkov (1885); Repose of Elder Isaac of Dionysiou Monastery of Mount Athos (1932);